Take 2 M2x5mm bolts and 2 female to female long spacers.

Place the Payload Board where the "KC&G LAB" logo is facing upward and pointing to the frame with the 3/4 circle cut.

Screw the M2x5 bolts to the right side holes of the Payload Board.

Screw the female to female long spacers to the left side of the Payload Board.

Take another 2 M2x5mm bolts, 2 female to female long spacers and 2 female to male short spacers.

On the middle of the battery holder on each side screw, the first bolt and a short female to male spacer then screw on the top of the short spacer the long female to a female spacer