Is the triangle the small indent along that lip under the sill ?
I put a phnumatic jack up to it but I was worried about bending it off it I'd got the wrong area
Hum, I too have not spotted what should be the universal obvious indication for the location of the car jack. Maybe something that Seat forgot about on some cars!
My 10 plate Ibiza had the jacking point markings on the sill, but looking at my facelift model they do appear to be missing!
That said if you look at the sill, it is obvious where the reinforced sections are for jacking the car. But as has already been said only use the standard jack at these points.
get trolley jack, remove 'cup' on top. cut slot in remaining metal part to allow sill edge to sit inside, job done.
Thank you for this truly worthwhile and informative comment.You work for a bodyshop?
The smart money is on buying an ice hockey puck, cutting it in half, then cut a slot in it - that is if you need to jack your cars up on the sill seam points.
Remember the slot that you have cut in the trolley jack's top mount is only to clear the sill seam, the claws/ring on that mount are now the only four/single small areas contacting the inner and outer sills - so they will be dented/punctured with time.
Personally I find there are enough rust/rot possible sites on these cars without creating some more.