The wires between EC and body loom in the plugs near the ECU according to my notes are:
111 orange/black aux5 -? big pin at end of clip in connector - fpcm?
119 purple/red na na small pin clip in connector, power light?
5 blue/white aux3 Tacho small pin clip connector
13 black/pink aux2 FP Relay small pin clip connector
17 red/white aux8 CE Light small pin clip connector
18 orange/black na na small pin clip connector
20 grey/red DI2 Start small pin clip connector
21 pink DI3 A/C Request small pin clip connector
22 black/white na DataLink Check small pin clip connector
27 white/red na na small pin clip connector and diode near ecu
28 LGreen na na small pin clip connector
29 yellow/green DI4 Vehicle Speed small pin clip connector
34 blue na 1 position signal small pin clip connector (auto)
35 pink/black na 2 position signal big pin clip connector (auto)
37 purple/white na throttle opening signal TPS OUT 1:1, needs buffer, non clip connector
38 LGreen/red na D position signal big pin clip connector (auto)
39 green/orange na Neutral signal small pin clip connector (auto)
40 red na R position signal big pin clip connector (auto)
58 white/blue na ouput shaft rotation speed small pin clip connector, sheathed wire (auto)
61 red/black na na non clip connector
64 brown/red na na small pin clip connector, power?
68 green/red na na small pin clip connector, OD light
69 LBlue na na small pin clip connector
70 green na na small pin clip connector, snow?
75 brown/yellow na datalink rx big pin clip connector
76 yellow na datalink tx big pin clip connector
I also have some notes for the white and black plugs behind the coolant overflow in the engine bay:
106 LGreen/black aux1 na blackplug behind coolant overflow
113 pink na na pale plug behind coolant overflow
115 pink/blue na na black plug behind coolant overflow
120 yellow/green na na black plug behind coolant overflow
121 blue/red na na black plug behind coolant overflow
122 brown/yellow na na black plug behind coolant overflow
14 brown/white aux inj7 AC Clutch pale plug behind coolant overflow, responds to DI3 (AC request), turns off over 5000rpm and back on under 4200
24 green fan flyback?? ign sw??? pale plug behind coolant overflow
26 grey DI1 PS Switch pale plug behind coolant overflow
31 green main relay in ignition relay pale plug behind coolant overflow
This was all from a S1 25X Four (RB25de Auto 4wd) before I proceeded to remove a bunch of the loom and fit a 30det.
Important things would be:
blue/white aux3 Tacho small pin clip connector
13 black/pink aux2 FP Relay small pin clip connector
17 red/white aux8 CE Light small pin clip connector
grey/red DI2 Start small pin clip connector
21 pink DI3 A/C Request small pin clip connector
29 yellow/green DI4 Vehicle Speed small pin clip connector
37 purple/white na throttle opening signal TPS OUT 1:1, needs buffer, non clip connector
14 brown/white aux inj7 AC Clutch pale plug behind coolant overflow, responds to DI3 (AC request), turns off over 5000rpm and back on under 4200
26 grey DI1 PS Switch pale plug behind coolant overflow
31 green main relay in ignition relay pale plug behind coolant overflow
Vaughan has taken a couple of days off so he may not reply here until next week. I think he stuck with the grey plug loom in his stagea probably as that's just what it had. He knows the platform well though so I suspect he should be able to give a bit more info on how easy or difficult it is to fit a blue plug loom into one of those cars.
GTT plugin doesn't have the TPS buffer for the Attessa computer like the GTR does so your 4wd won't be happy if you just throw a plugin in. You'll need to build/buy a buffer circuit or setup a spare output as an 'Analog output' style setup which is what I did for mine. Buying a little buffer circuit is the easiest, I didn't do that because I'm running E-Throttle and so will have a different TPS voltage range on my throttle body than the factory one.
From memory pin 37 is the one that needs a buffered TPS Output on it, if you have a search of the forum you should be able to find this info on some other posts.
