I have a HOG backplate and DGX Ultimate Hogarthian harness kit. The instructions say to use the top hole in the backplate, but the middle hole seems to work best. The top hole puts a tough strain on the webbing to start. Is the middle hole okay, or is there a reason to use the top hole? Ignore the bolt, it's just what I'm using right now to hold the harness in place. Not sure whats best to use permanently though. It seems nylon bolts, stainless bolts and zip ties are used....