Question on mounting factory tail light guards

[Marauder]

I ordered a set of factory tail light guards. I just read the instructions and I had been under the impression you mount them with screws behind the tail gate (its an suv) and 3m tape on the outside mounting location.

But it looks like you have to drill into the sheet metal of the truck to install 'well nuts' and then attach the guards to those nuts with screws.

I hate the idea of creating holes in the truck that if I ever wanted to take them off, would have to be fixed by a body shop or the screws left in them and look ugly.


What did you guys do? And was I mistaken when I read some people say the factory used 3m tape?