IIRC the wires are green and blue all years. Mine come out of the firewall (I don't think they come from the fuse panel connector) pass right by the brake booster, and there is a connector near the booster in the lines, I guess for different lengths of wire.
Can't help you on the frame location, but if you don't know, the plug is on the top front drivers side of the transmission. I don't think you can see it. Older 465's use a round style two prong plug kind of like an oil pressure sender plug, later ones ('85+ or so) use a two prong weatherpack.