Took off a Witter Towbar 15 mths ago from my 2010 Insignia Hatch and will be shortly fitting it to my new Insignia arriving soon.

When removing the Towbar there were 2 bolts bolting the irons from the underside into captive nuts on each side of the chassis and 2 bolts each side from the rear screwing into threads already there by Vauxhall.

Question is, Can't remember if these bolts from the rear were bolts Vauxhaul fitted or part of the Towbar kit.

Any clues

thanks