A clamp/holder to attach one of these chinese Meanwell PSU clones to the frame of a P3Steel. Therefore it should work with an original meanwell one too. The clamps are inserted into the elongated holes of the frame. Toolfree! parts to print Assembly: Insert the top clamps into the enlongated holes and turn them 90° to lock them into place. Then insert the two 2 clips and lock them also. Now you can clip the bottom clamp on the clips. Slide the PSU in and you are done. BTW: Stability is only achived if the PSU is inserted, as the parts are kind of interlocking because of the toolfree design. This is especially true for the bottom clamp, as it is only resting on the clips.