I'm thinking my amp gauge could be dead, but I may not have it hooked up correclty to the horn relay, so I have a question on it. In my instructions, the black wire is on the junction block and the black with white stripe is going to the horn relay (or vice versa, the actual coloring is not what I'm concerned with). It says to a positive screw of the horn relay. I see a lot of people saying to put one on the (BAT +) spot on the horn relay. How can I tell which is this spot, or does it matter exactly what screw you put the wire under? Thanks.