Furuno MU-150HD Operator's Manual page 19

1. MOUNTING, WIRING
1. Loosen the knobs of the bracket support to separate the mounting bracket from the bracket
support.
2. Set the mounting bracket to the mounting location with four self tapping screws.
Mounting Bracket (15)
Self-Tapping Screw
5x20
Mounting Bracket (15)
11
Bracket Support
Knob