We secured them with spring eyehooks at both ends. Too bad since it would have made the use of the restraint jacket unnecessary. Here is a list of possible interventions, starting with light'n easy and ending with industrial-strength. Try a Walkman. I've seen miracles when earphones were placed on severely demented residents with pressured wandering, shouting, sundowning.
Wanderers are generally bored and lonely.
Provide radically interesting alternatives to wandering through your activities program. Try a program of phototherapy. Redesign the facility. On an individual basis, using skilled observation notes, nail down the time wandering starts, and set up a well-tailored behavioural plan to head it off at the pass.