Evening All, First time Caterham owner (2008, R400), and have a question over the Luke 4 point harness fitted... I may be being a bit dim but there are two straps that come up from underneath the tillet seats each with a large loop on the end. Do these somehow fit to the harness to make them six point or are they actually arm restraints? I'm a bit puzzled as they are bolted in and are only adjustable for length, the loop ends are fixed size? Thanks Dan