I dont have pics, but they are the same as a regular passenger seat - two double position hook lugs (?) on the tubs (one bolted, one welded) and then two u-brackets (instead of one) on the rear bulkhead.
Yeah looking at the bulkheads thought that was the case so need a pair of those its the seat base fixings I'm missing .... typical 2 benches both missing the same parts unless I'm having a particularly blonde time this last couple of weeks...