In that photo, the shock cord looks like it is going to the cleat in the system. It usually goes to the top of the ring. With those particular rings, the shock cord goes to the loop in the pulley.

Also, that white/pink/purple rope going through the tramp should go to the spanner at the base of the mast, not to the boom.

I have edited the photo but can't seem to upload it atm...will try later.