The simplest system is shown at the bottom of P. 52 in the catalog:
https://static.hobiecat.com/digital_ass ... 1490960951It consists of trap wires (2), 1/4 " (I use a strong 3/16") trap lines (2), dog bones (2), rope locks (2), and about six (?) feet of 1/4" shockcord. The upper end of the trap wires are attached to the mast tang like your shrouds. I use shockcord hooks to attach shockcord to the bottom ends fo the trap lines (rather than the hog rings shown)......you can get by just tying the scockcord to a loop in the trap line with half hitches.
Double all this for double trapeze system, if desired. Oh, and you'll need trap harness(es).