A: Assembly steps:
1. First, Open the package and check the contents: 6 plastic faces of the case + 4 screws + 4 screws caps + 4 PCBA pads

***** Use caution when assembling the case. Excessive force could break the acrylic case. Follow all directions carefully *****
2. Install the bottom panel. Align the Raspberry Pi to the four screw holes, and place the protective pads between the board and the case. Tighten the screws with the nuts over the board as pictured, but do not over tighten to avoid breaking the case or the board.

3. Install the side panel as pictured. Ensure proper alignment of all ports.

4. Install the other side panel
5. Installing USB port side panel. To avoid damage, pay careful attention to the direction the plate is installed. The two bumps, acting as feet, should be oriented to the bottom of the case. First, position the upper slots over the hooks above the USB and Ethernet ports, then pivot the plate downwards and, using gentle pressure, snap it into the lower hooks. To remove the plate, remove from the bottom first by pulling gently and evenly on both sides, then remove from the top two hooks.

The following images shows the lower lock. Gentle, even pressure on both sides will allow removal without causing damage.
6. Install upper cover (the left and right two columns on the upper cover are placed in the outer shell of the two side panels). This cover is only installed if the 3.5” display is not going to be used. There is an opening on the cover to allow installation of a case fan (not included).
7. Install the SD card side panel, once again with the feet facing down.
Assembly completed:
Bottom surface:

SD card pull out method:
Use sharp tweezers or pen head to gently push the SD card, then remove it using your fingers once practical.

When ready to use the 3.5” display, remove protective film for best results.
 The screen is inserted into the corresponding interface.