Solar Panel, Unmarked Pigtails, which is Positive, Negative?

I have another related question and since it is about the mounting of solar panels on an RV roof, I will ask it in this thread rather than start a new thread.

I have stainless steel hardware to fasten the solar panels to my RV roof. Since stainless steel is known to sometimes gall, would it be wise to use a little bit of Anti-Seize on the SS nuts and bolts when assembling them? The pic below is of some copper-based anti-seize that I happen to have.