> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/xbb020-and-xbb021-manufacturing-description/assembly/mounting-plate-and-card.md).

# Mounting plate & card

1\.    Start by screwing the 4 screws (M3x10) with the short spacers (4mm thick) into the mounting plate. Tighten to secure.

2\.    Mount the first analog card (the one at the bottom) with the contacts in the direction of the cutout on the mounting plate and screw the 4 10mm spacers (female-female).

3\.    Mount the second analog card (the middle card) and screw it with 1 pc 10mm spacer (female-male) in the corner with the red LED, and with 3 screws (M3x6) in the other corners.

4\.    Screw the 2 pcs 27mm spacers with 2 pcs M3x6 into the mounting plate.

5\.    Mount the BBO board (the larger, top board) and screw it with 3 M3x6 in the three corners where there are spacers. Tighten to secure.

6\.    Attach the labels from the two analog boards to the mounting plate at the bottom right. The label for the card at the bottom should be at the bottom and the other label should be above it.


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