Low volts at idle

I read that mad artical and so I'll be checking the volts the way you explained but considering my bulk head connector looked the same as in that artical (melted where the main power wire is) I'm going to drill through it the way they explained and bypass the ammeter. For some reason I remember the connections that go to the ammeter loose and when I went to tighten them to the posts on the ammeter they made a big spark. It seemed like it would be a bad idea for those to touch but if they are ok to put together then that's what I'll do