Decided to investigate the rattles and knocks from the rear of my car today. Traced one source of knocking to the bodywork contacting the spare wheel carrier. Temporarily solved that with a rubber sleeve (I'll be getting rid of the spare when I get the body repainted over winter), but while checking that out, I realised the rear of the bodywork was cantilevered out without any support aft of the roll bar, other than the bottom of the boot box against the top of the fuel tank. That can't be right, and that led to the rear of the body rattling up and down against the rear of the chassis. A temporary fix (yes, another one...) has been to insert a couple of dense foam wedges but I can't believe the body shouldn't be secured to the chassis at the back. Looking round, I can see two square(-ish) pieces under the rear, which look like the body ought to (or could) be bolted to them. Am I right in assuming this? Here's a photo from somebody else's build thread (sorry, can't remember who), with an arrow pointing to the part I mean. Is this a body mounting point?