Guy
The end of the J60 starter motor has two connections. The larger of these is the negative connection. The smaller has a single wire attached, held on with a nut, for the thermal cut out. Because of its location and small size it can be quite difficult to tighten properly, and can therefore have a tendency to work loose, which if it does will prevent the starter motor operating. As Chris can testify it is particularly annoying if this happens after youve put everything back together, as the only way to reach it is to remove the decks, drivers seat, and drivers firewall. I assume this is what Chris and Mark are referring to.
Cheers
Timbo