Century EB-4 Owner's Manual page 44

Section IVA - OPERATING INSTRUCTIONS
WHEEL LIFT (cont'd)
4A.4 VEHICLE HOOK UP (cont'd)
FIGURE 4A.7
TIRE RESTRAINT PLUNGER PIN MUST BE ENGAGED
IN TIRE RESTRAINT ARM
NOTE
IT MAY BE REQUIRED ON SOME VEHICLES TO REMOVE THE
HUB CAPS BEFORE INSTALLING TIRE RESTRAINTS.
(c) Pivot end plate until tire restraint captures tire. Replace pivot
positioning pin.
IVA-6