Since I have no use for hardwired audio (as stated, everything is Bluetooth these days) and the H2 SX has a 12V socket built into the dash (SE only), I modified the harness down to a streamlined version which can easily be taken on and off the bike as needed. This means if you own multiple bikes you can use one wire harness on all of them instead of buying a hardwired power harness for every bike.
Take the power cradle apart, taking note how the locking button at the top comes apart . . . don’t lose the small spring.
Basically I dead headed the internal large connector for all hardwired audio and USB function, just cut it off. Leave the second smaller connector with the red and black wires, this is the 12V power source.
Cut the overall harness to a needed length, taking into account your GPS mounting location on your bike relative to your 12V socket, leaving extra slack for turning the handlebars. This will remove all the extra connectors. Then strip back the end of the wire bundle and locate red & black. To verify you have the correct wires, just check continuity between the small internal connector and the wires at the end of the bundle. Cut back all the other now extra and useless wires within the bundle.
Next, solder red (12V) and black (ground) to the appropriate locations on a cheap, fused (important! 2-3A recommended) 12V cigarette adapter (you’ll have to disassemble to do so). Red (power goes to the center post, and black (ground) goes to one of the tabs on the side of the adapter. Here’s the end result: