I sent the following email to Jim:
He suggested a Centech AP-1 fuse panel, his single horn harness, but then he lost me at:I wanted to describe what my goal is and then see what you suggest I buy.
I have a 2005 DL650. I've purchased a Stebel Nautilus horn. I also have a Zumo 550 currently wired back to the battery, and would like to add some heated handgrips and a 12V power outlet plug for my cell phone charger.
I know I need a harness for the horn and relay, but I'm not sure how to handle the other items. What do you suggest?
You can then run a Socket Kit and tap power for the Zumo off of that. You can use a pair of Posi-Taps or I have a special Socket Power Tap with fuseholder that will work.
Checkout my Socket Wiring Page for the best solution for your socket