I have 2014 Mondo with a single battery and a single factor installed amp.Took it out of storage this spring and a bunch of the accessory switch do not work, but the stereo and ballast pumps work. Long story sort I took it to a different shop for winterizing and storage was the first time I actually had the battery disconnected and removed. What I am wondering is if someone knows how many ground leads should be at the a battery? Right now I the ground for the engine is there (on the main post) there is a second ground wire (on the threaded post) that looks like it goes to the distribution for the amp. These two are all that I can see. Based on the accessory's not working I am thinking there is a third ground wire that goes onto the battery which may have fallen or got misplaced when the battery was removed. Can anyone confirm? Will save me a lot of troubleshooting.

Thanks