Im installing my boost gauge really quick and need to run power to it, but however on the back of the vdo gauge there are 2 prongs, neither are labeled for voltage and ground, so i have no idea which to connect. are they flip flop where it wont matter or what?

any1 with this gauge let me know!

 

Probably doesnt matter its just a light

 

It doesnt matter, or i got lucky on my first try with mine.

 

haha i figured if neither were labeled it wouldn't matter.... thanks