THIS is an Add-a-circuit. Crimp your power wire to the blue end. Plug the fuse end into a suitable location in your fusebox (I used Homelink fuse location) and plug the fuse you replaced into the back like in the photo. These fuse taps come in different sizes: ATC, ATM, ATO, etc. so make sure you pick up the correct one if you decide to go this route. I used the ATM fuse tap. Picked it up at Autozone on the way home from work one day. I hope this helps.