Having looked at the wiring on my 2016 B2301 I would not use any of the factory lines, they are very small gauge wire and the protection is OK but not great.
I would added an additional fuse board and then power everything from that. You can direct feed it from the battery or relay feed it if you prefer.
I looked at using the rear pre wired out feed for LED lights but in the end ran a complete loom with relays and fuses, that way I can test and troubleshoot if needed. I did the same with the relays to control my rotator and chute.
I do use the cigar lighter outlet for my LED beacon.