Humminbird HDR 400G Operation Manual page 14

IN-DASH UNIT MOUNTING PROCEDURE
Select an area directly in front of or to the right of the operator for best viewing, especially
at night.
Before mounting the unit you must decide where to mount the alarm. It has been
designed to mount either to the back of the unit or away from the unit where it can be heard
easier. The alarm can be mounted on a surface near the dash or a hole can be drilled so that the
alarm can be sounded directly through the dash (see Figure 12).
NOTE: If you want to mount the alarm farther away than the one-foot cable will allow, you may
splice in a 2-conductor cable up to 20 feet from the unit.
The unit housing will mount in a 21/e° small gauge hole. Pass the cables through the
hole. Hold the unit housing in place and mark the location of the mounting screw holes. Drill four
3/32° pilot holes. Attach the housing with the four #6 x 1/2" screws provided (see Figure 13).