How accessible is the screw?

In this situation i would normally cut a groove into the screw with a fine hacksaw blade so that I can use a flat head screwdriver. But that depends on if you can get a hacksaw blade in there.

I’ve also successfully drilled the head off a screw (on my n800) but I’d only recommend that if you have a really fine drill. I was using an engraving machine with a drill bit on it.