Without a better picture I would say it's the AC harness or the TCS harness (transmission controlled spark) an emissions system that most guys rip out because it does nothing much for performance or emissions.
Here is a diagram of the AC wiring for you to examine. The power wire plugs into the fuse panel CIG terminal it's orange, and the AC switch has the colors shown.
There is a green wire that goes to the AC pressure switch and a purple wire that goes to the blower motor.
The TCS harness is mostly on the engine firewall with a couple of relays and a plug that goes down to the transmission and one that goes to the carburetor'