this is from my experience do far...
there is nothing catchng or holding the slip ring from the bottom. slip ring has to be inserted vertically up. for slip ring to not to come out its socket, the location of daughter boared inside of turret has to be near slip ring socket (on the 360 rotation gear) because when you rotate turret and move barrel, placing daughter board in wrong location can pull out the slip ring from its socket. you have to make sure when barrel is moving up & down & when turret is rotating its not pulling any wires.