Headlight polarity

This is the 6V headlight out of my 51 chevy (I might have it upside down?) According to the pigtails, the polarity of the studs are as indicated on the picture.

I've converted to 12V so I'm going to get new headlights but I wanted to keep the old pigtails. Someone told me that on a 12V light, the horizontal (bottom of picture) is the ground. Can someone give me the polarity for each of the studs on a 12V headlight?

thanks.

 

just plug 'em in....nothing changed in the plug from 6V to 12V

 

Nope... it's the right vertical (looking at the back of the headlight) one I believe. I just went through that with some headlights... if you look at the filament you can see that one side is common to the two filaments.

 

Ditto, what propwash said.

4TTRUK