My winter of 2007-2008 Buell Ulysses Upgrades/Accessories Installation

Electrical Updates
My first question for the folks at BadWeatherBikerss
So I’ve been spending all my money on toys for my Ulysses. This topic is regarding my installing the electrical components mainly my Garmin Zumo 550 and my heated suit. I might possibly add some lights to the mix in the future. Keep in mind I am no expert, but I trust my work over a Tech who doesn't care about me or my bike.
Question 1: What is the hanging out on the right side just under the saddle for?
Unknown plug on Buell Ulysses seat Unknown plug on Buell Ulysses seat 4 male pins

Question 2: There are two fuses the Buell Uylsses owner's manual says are spares. Does spares means just a fuse holder or can I hook my extra electronics items in here?
Fuses images from Offical Buell Ulysess's Owners Manual My Buells fuses

Thank you to everyone/anyone for your help.

I ended up wiring my zumo directly to the battery, and it has worked out well.

As for my heated suit I ended up building a ciger lighter plug adapter that my controller plugs into. Although this method was very easy to put in and remove in the summer, I would suggest to anyone else putting in a mounted duel controller. I fully intend to either my my belt controller somehow or purchase a controller mount.

I have pictures of all these upgrades somewhere, but for now you can took a look at my other motorcycle links.