Plug BLACK-RED-GREEN cable to 3 pin port on the AShot board (see the photo).
This cable will be connected to Reach M+ board:
BLACK is GROUND;
RED is +5v;
GREEN is for Timemark signal going to GNSS board.
Plug BLUE-YELLOW cable, coming from previously attached custom AShot flexible cable, into 2 pin port as shown in the photo.