I have a vauxhall combo van and I need to remove the front driver's side carpet so I think I need to remove the runners that the seat is on. Does anybody know what tool I need to do this? It doesn't look like any kind of bolt that I recognise. I need to remove the carpet because I need to dry it out and then try and find out where the damp is getting in because the carpet and floor on that side have been soaking for ages.