As far as you wires go, I'd neatly use electrical tape and bundle them up. You may have to live with the fact that you can't see your speedo. You could take a razor blade and hollow a pad out but I still don't know if that would lower it enough. I did that on one of my old sleds just to make the pad fit right.
"You miss 100% of the shots you don't take" (Wayne Gretzky)
"Not everyone gets off to a great start, but you have to start to be great" (Zig Zigler)