Fuse Box Access

I'm wiring up a light bar and want to put an add a fuse on the high beam fuse. How are you guys getting a new wire into the box? I can't see any way to do it without drilling a hole in the upper side of the box or the lid.... There has to be a better way! Please help.

 

The main fuse box in the engine compartment has a large wire harness that goes in from the side. Get a pocket screwdriver and pull the tab out and wiggle the harness and put the wire for the add a fuse there.

 

Thanks, but all my harnesses come in from passenger bottom with taped ends. All but one is square plastic. That one goes to the motor and has a tab that looks like it releases, but nooo. Even if it did the wire bundle is taped up into the box. I do see a spot next to them on the passenger rear corner that looks like a small hole will work. This thing is sealed tight...