i didn't realize the screws weren't meant to come out and i guess i forced it with an impact driver / screw driver attachment. doesn't seem to wanna thread back in. also, i'm not sure i can even use these with stranded wire? the screws don't pop out at all - they're just mean to close an open a these lil holes that seem meant for solid wire. maybe i could make the stranded wire work with ferrules? here's what i have: