The camera flex cable should come out the back of the NavQPlus and loop over top of it. Then route under the lower edge of the front bracket. and up into the camera module.
The final setup should look like this:
Camera Flex cable routing over top of NavQPlus and under front bracket.
Front and rear plastic
Screw the front and rear plastic to the top plate using two M3x5 screws from the bottom
The camera flex cable should already be attached to the front plastic.
Ziptie the cables coming out of NavQPlus underneath the metal frame neatly as shown in picture