Ok so I got an 8ga Stinger install kit for my amp at best buy. It came with an in line fuse hlder that looks like this :
Now how the F do you mount this thing to the firewall? There are screw holes on either side of the holder but they are completely blocked by the threads that hold the end caps on...? Has anyone ever installed one of these?

Now how the F do you mount this thing to the firewall? There are screw holes on either side of the holder but they are completely blocked by the threads that hold the end caps on...? Has anyone ever installed one of these?