I bought a standalone harness for a Gen 3 for a swap I'm doing, and it didn't come with AC wires. How can I add AC stuff to the harness?

Is this how standalone harnesses usually are? I've bought a Gen 4 E38 Harness that also didn't have AC wires.

Thank you!

 

Contact harness manufacturer and see if they/you can add it

 

Been running 2 DBW swaps with aftermarket AC. No issues without AC request to ecu.

 

I just added AC, LY6 DBW controlled by an E38. I didn't do anything with the ECU, I can feel compressor clutch engage when I'm at a stop light but never stalls.
GM Denso truck compressor is controlled by Vintage Air Gen IV Evaporator along with a Trianary switch for protection and Radiator high speed fan control.