the screw is stuck which is how the screw lost the threading, i've tried multiple screwdrivers, and i am unable to get to the other end to see if i could remove it from the inside. it is only accessed through removing these 2 screws. it is the section for a radiator.
When I mentioned to use a drill bit I meant you use a drill bit by itself; just the bit, not attached to a drill. Now try from the inside using your fingers and the drill bit.