X5S Z endstop fix nut trap

For those who assembled the Z axis bed mounts reversed with the holes on the inside (I did at first), a fix.
This is a redesign (added a nut trap) of the part that was created by Jacob Christian Sehested Blad on our Facebook group (Tronxy X5S, X3S 3D Printer Drucker Users). As his part is not on Thingiverse, I could not add it as a remix of it and give it proper credit.