positive

Is there any special procedure to follow when replacing the positive terminal bloc on the engine?

I have a Z3, but accidentally bought the wrong plastic positive terminal cover, one that doesn't fit mine, but does fit an E38 or E39. If you can use it, I'll just ask for the postage from North Carolina.

Hey guys, The fog lights were gone on my e28 when I got it, and now I feel like putting some new ones on. I looked today at the fog light wires, and I was wondering which one was the positive and which was the negative. The two wires that I see are Brown and Yellow (or maybe Yellow/Brown?) I...