+ Ground Battery Charging Question

When charging a 6V battery for a system that is + ground, do you hook the red lead from the charger to the + terminal or the - terminal?
I would think that you would hook it up like a - ground system (Red to +, black to -), then install it + ground in the vehicle. This is a new guy to + ground question that I'm sure needs to be clarified.

 

You still charge it the same as a - ground system.....
At least I do....
If it is hook-ed up backwards your charger will probably let you know......
HC

 

I thought you were going to run new wiring.
Ya know it would have been done by now.

 

Red to Red, Black to Black....

My charger freaks out (Buzzes and the needle jumps all around) if I hook it up the other way.

Mike