I've found a few pics of BMW E30 and E36 differentials for comparison. I believe both chassis were fitted with small (318) and large (325) diffs.
E36 front mount is a single bolt on the lower right side inserted horizontally front to back.
E36 rear mount is a two eared affair integrated into the rear cover. This is a small case judging by the single top bolt in the rear cover. Large cases have 2 bolts.
E30 front mount is four bolts inserted vertically.
E30 rear mount is a single ear on the left side integral with the rear cover. This pic is the small case. Note the single top bolt in the rear cover.
