Need IAC wiring mojo

68 Camaro, 5.3/4L60E swap from a 2002 DBW truck. Has been converted to DBC, but the IAC is miswired. More steps = lower idle.

ECU is shoved under the dash so that it can't be seen, guy who brought the car says "it'd take an hour to unscrew the connectors if I had my tool box."

Anyone with GM 4 wire IAC theory? Does polarity matter between the two coils?

Not my problem, but I would like to help the guy out within the limited time frame the car is here today. Thanks!

Swap any two wires at the IAC and it will work correctly.