Join Date: Jun 2011
Location: Hamilton, Ontario, Canada
I don't have the motorized belts in my 87 Quad, but my cousin does in his 88 Veloce, so I have some familiarity with them (although his too are not fully functional and I am slowly trying to get his sorted out).
If you can find a set of adjustable lap belts that have a buckle of the appropriate size to fit the fixed latch, and an anchor plate on the other end, you should be good. The belt/latch is straight forward, and anchor plate can be bolted to the existing tether points just in front of the spooled belts coming out of the parcel tray. Given the height of that anchor point and how low the fixed latch, it may fit more like a belly belt instead of a lap belt.