In your boot on the near side should be a jack in the recess, and if like mine a 2nd recess to house the socket and Allen key. Top tip here, the recesses are open into the wings so dirt comes in, so block these up with the Jack and sockets wrapped up in cloths/bubble wrap.

The bar was secured in the boot along the rear edge with pipe clips.

I know it is often mentioned on here that you can bend the bar doing up the nuts, but I have not had any issues. The grub screw location is a serious point that can not be made strong enough.