This is a housing that will work for the latest release of QUBDs TwoUp Printrboard clone. This is designed to accommodate the horizontal format of the stepper drivers and limit switch connectors. It is also configured to mount to the back of the supplied power supply. Note, however, that QUBD could change suppliers at any moment for either the board or the power supply.Mount the 'middle' piece to the 'base' using #1 x 3/4" screws. The top mounts with M2 screws. The board mounts with M2 case screws. To run the wires, slide the sleeves away from the connectors and run the bare wires through the retainers as shown in the photo.