This is a bracket that is used to mount LED strips using screws. It works for 2-pin L shaped LED connector for 8mm wide LED strips(should work with 10mm strip too).

Please hold it still while tightening the screws to make sure it won't rotate with the screw and don't tighten them too hard.

This bracket holds the corner connector in place by applying gentle horizontal tension on the LED strips, with the help of neighboring bracket. It works more like a hook and does not rely on vertical pressing force.

Please see my picture for how I mount them.