1952-59 Ford Light Switch Connection

OK. My new oil pressure gauge is in place beneath the dashboard and functioning properly. Can someone please tell/show me the proper terminal on the light switch to connect the lamp to? (It is a 12v. lamp, but will light up with a 6v. battery.) Is the ground separate? Or is there a better place to connect it?

 

Go to page 5 of the FAQ Sticky post # 138-142 discusses Ford switch wiring with lots of pictures,

 

Or if it is easier, you can T off any stock dash light spade....Yes - it must be grounded - just run a short wire to the screw where the gauge bracket attaches to your dash.

 

Thanks guys. You're the best.