Simrad Robertson AP9 Mk3, Instruction Manual, Page: 93 / 202

Installation
20169223D
5-3
Screen termination
Strip about 1 cm (0.4") of the cable's insulation and pull the screen
backwards to cover the insulation. Screw the connector block onto
the actual control unit socket. Screw the connector shell onto the
connector block. Fix the cable screen to the shell by a wire strap and
tighten well to make sure the screen has good contact. Apply a thin
layer of pure Vaseline on the shell threads. Screw the cover onto the
shell until it makes good connection with the control unit cabinet.
Fasten the ferrite core as close to the connector cover as possible by a
wire strip (Only for J1, J2 and J3 cables).
The control unit has a ground terminal and must have a proper
ground connection to the hull. The grounding wire should be as
short as possible and at least 10 mm wide.
For grounding of the screws, also refer to Fig. 8-6 screen termination.
Fig. 5-4
Control unit - connector mounting