Do I really need the escutcheon to put the actual headrest in, or can I just set the headrest in the slot on my bench seat? Doesn't the escutcheon plate just kind of lock it in there and the adjustment slots? I've got one headrest in on the driver side and the passenger side has the base and the hold cut, but the actual headrest isn't in because of the escutcheon plate. Looks kind of tacky and just dawned on me I could probably just drop the other headrest in there for now for looks. They're '71 bench seats. Thanks.