Insert the holders (arrows.stl and right.stl) into the top frame of the printer. Fix them with M5 screws. 1 x M5x30 screw 3 x M5x12 set screws If the holders are too tight to insert them into the 20x20 frame, sand two lines (indicated with red circles in a photo) at the bottom of the holders. My ET4+ Klipper installation memo in Japanese https://gist.github.com/t-nissie/9256acaf29cc901fa1504d7ace79a2e3 SHA256 checksum 3f92e5ed74abf489d3660324819266d8c455e6a57bcd0199e822350b76956d10 arrows.FCStd 9bbbf5035ed8ce124d5f7fc72cc7b7bb2d8a20bc266c703cdc62b8e5caa8b1e1 arrows.stl a6dce6b946dcc85ad5e3d173088d5dc6990f98d4b23cf582e5d742a3b833c958 right.FCStd d9b5947008fb939036cebe5da4d1498589c3c2dcbea3bd81294eca79a734af33 right.stl arrows.FCStd and right.FCStd are FreeCAD source.