Littlefuse 3961573

[CURSED GEARS]

Hello. I'm rebuilding my 1970 C10 short bed. I got tired of doing body work, so I switched it up and started working on my wiring. (idiot lights, to gauge package, repair cracked and cut wires, ect. I should say that Its a AC truck, however I took the AC out long ago.
On the wiring harness that goes to the starter, dist, and temp and oil pressure, the po had two wiring harness's jerry rigged together. On the firewall was what I think was a relay. Its marked Littlefuse Inc, and numbered 3961573.
To make a long story short, while trimming that double harness of stuff I thought I didn't need, I now can't find where that connector goes to the mystery relay. (Wires green and blue I think) I guess my question is, was that relay for the air conditioning? Do I need it now? I've used search, looked at all of the diagrams, and read all of the threads, but cant find the answer. Can anyone help?
I don't know if this was clear or not. I hope so.