MCU Tray MCU Installation Overview Materials As IllustratedStockHSI Parts Qty Note M3 x 6mm machine screws 8 BIGTREETECH SKR 2 1 MCU Tray - BTT SKR 1.3-2 1 Printed Parts Qty Note M3 x 6mm machine screws 4 Some boards may use 5 or more. M3 x 8mm machine screws 4 Compatible MCU 1 MCU Tray 1 Printed Parts Qty Note M3 x 6mm machine screws 8 Some boards may use 5 or more. Compatible MCU 1 MCU Tray 1 Printed Directions 1. Place your MCU on the tray and align the mounting holes. Important Larger trays (e.g. BIGTREETECH Octopus series or the Manta M8P) will only fit in the case if the board is oriented one way, as the trays are not symmetrical. Check which direction fits in the case before securing the MCU to the tray. 2. Use four (4) 6mm screws to secure the MCU. 3. Set the MCU tray on the pillars in the case. The board's power connectors should orient to the back of the case or to the side. 4. Fasten the tray with four (4) M3 x 6mm screws. Reference