Hey happy new year!!!
Im only a novice. I use some 3mm spectra between my forestay & bridle to tension rig .
and the two thinner wires are prob trapeses (it may be set up for twin traps) photos would help.
Oh well hope that helps you.
Also on the mossie web page there could be some photos.http://s51.photobucket.com/albums/f392/vmca/MosquitoRigging/