Most of the CDH FM board is preassembled by MicroArt. The additional assembly steps that were needed from our end included:
Soldering the data and power lines to the CDH board
Conformally coating the CDH board on both sides.
The picture below shows the CDH board being conformally coated after which the harnessing cables were soldered.
All other CDH/COMMS module assembly steps are detailed in the COMMS Final Assembly page.