Just a quick update, I checked these pads which seemed to be in the right place, but I managed to solve all the sueaks over the weekend by simply greasing the latch and hinges and also the seat pins and door latches while I was at it, this has eliminated al the sqeuaks now. By giving the car a deep clean when I got it I washed all the old grease off. so hope this helps anybody else with squeaky tailgates!