lower lug. The 15 amp fuse & holder is in there too. Moisture effects everything in there, and the MPEM plug-in connections. If water gets in VTS, can effect mpem.
A free floating piece of metal inside the mag housing can short out the system regularily, or irrregularly, depending on what it touches. If it is not a broken gear tooth or starter shaft spline, it could be a piece of the centrifical weight holder retainers inside the bendix, as they break off regularly and there are 6 of them. They are U shaped and about 1/4 inch long x 1/4 inch wide. Not only a huge hazard to the destruction of the stators coils, but also a hazard to the ignition pickup by gounding it out killing spark and the power to everything else. Bills86e