Help hooking up alternator wires and Sunpro oil gauge light

[WH23G3G]

Ok I think I have the 60 AMP alternator on my 73 400. Standing in front of the car looking at the alternator there is a stud, one blade terminal on the passenger side and one blade terminal on the driver's side of the alternator. I've got a green wire and a blue wire. But my diagram doesn't specify where each one goes? Does it matter?

I'm running the standard gauge cluster in my 73 from a 72 Coronet Highway Patrol car. It's got a certified speedometer, oil light, alt gauge, clock, fuel gauge, and temp gauge. I've added a single $20 Sunpro mechanical oil pressure gauge to the bottom center of the dash so it looks professional. It's right in the center where I can see it easy. I put a brass tee on the block and used my original oil pressure switch for the light and this Sunpro mechanical gauge. I put teflon paste on the fittings inside and out, I don't want leaks. I ran the nylon tubing with some slack and ran it through a grommet. Now I want to hook up the illumination light. It would be nice if I could hook it in conjunction with my headlight switch so it comes on when the switch is on. Do I have to cut into the dash harness to do that? The other option would be to have it on all the time. Could I just add a blade terminal and plug it into the ACC slot on the fuse block? On the back of the gauge it also has two studs with nuts like an alternator gauge. What would that be for? The light bulb socket already has a red and black wire coming out of it.

[Nacho-RT74]

doesn't matter where you plug the green and blue wires at alt prongs.

the underdash harness have a provision for acc gauges lights, just right around the AC/Heater control. Is an orange female bullet kind junction, with 3 cavities. Piece of cake

[WH23G3G]

Should I plug in the illumination light at the orange mold plug near the A/C or the extra Accessory plug on the fuse block?

[Nacho-RT74]

orange mold