If you need a fuse panel connection and have mini ATM fuses, this is a must! Very easy to use: - Find the power source you want to connect to (you can do this with a test light or voltmeter) - DISCONNECT the battery terminals - Pull the fuse of your choice from the fuse box - Insert the fuse you just removed one of the panel fuses in the bottom slot (closest slot to the 2 metal tabs) - now install another fuse in the top slot (choose a fuse that matches the amp rating for the project you are working on) - crimp the wire in the included pre-wire connector (or cut the connector and solder the wires together) - securely connect all ground wires from your project to the car - reinsert the completed fuse tap into the open connector you removed the original fuse from - Reconnect the battery terminals - Now your project is complete. The only reason I put this fuse tap 4 h One thing was that I want this fuse tap to come in 2 versions: - red wire coming from the side (like this one) - red wire coming from the top ( sometimes it can be difficult to route cables with the red cable coming out in one direction ) In general I use and recommend this safety tap! CPS