Dometic OPTIMUS EPS Series Installation And User Manual page 48

Figure 5-8.
5-12
5.4.2.2 Sport Plus Tilt helm (EH1532)
Ground strap: install one end of the ground strap between the nut and
washer on the helm's mounting stud as shown. Connect the other end to a
ground point on the boat. This could be a negative bus bar, the negative
terminal of the battery, or a designated grounding terminal.
WARNING!
Use only the self-locking nuts provided. Substitution with non-locking nuts
may result in loosening or separation of equipment. This may result in loss
of steering, which could lead to a collision and/or ejection from the boat,
causing property damage, personal injury, and/or death.
EN