You havent really provided any info to help. The loom manufacturer should probably be the first port of call for questions about which ecu is controlling what functions and what needs to be set up in the engine ecu to making the trans ecu happy, all this would have had to be planned before making the harness.
If you cant get that info from the loom manufacturer then if you can provide all the loom documentation and a copy of the tune and log from the ecu and a better description of the problem you are trying to solve then we may be able to offer more relevant advice.