Ken, when I was photographing the power outlet I remembered you were asking about how the seat lock goes together.
I am still running the factory horn and have no plans to change it. I remember once, when a cattle truck was pulling into the lane I was in, going for the horn button and missing it - thats a potential problem if you change bikes often, the damn button was in a different place than the last bike. Back a gear and get the hell out of there worked for me.