you installed Skene lights ???
Interestingly enough I just installed one last night. I had purchased the shop manual for the F6C luckily so it showed me how to do it. The tail light is only accessible by taking the rear fender off. No too bad but the seat, back rest and side bars had to be removed....a few plastic pop rivets and the fender comes right off. From there you have plenty of room to work and mount the black box. Good luck.