Okay lets see if I can make this coherent. The top left portion is a close up of the left base of the triangle, notice how the upright extends into the base beam. That should be about 1/2".
The other top picture is the under side of the truss the center set of lines represent a rout for the truss wire. The four circles (squiggles really as I can't draw very well)on each side of the bottom segments are flush mounted carriage bolts going through the bottom 2/4 then the top 2x4 and held together with washers and wingnuts. The bottom drawing is a side view of the hole contraption. Under the center section of the beam there is room for a turnbuckle to provide tension adjustment for the truss wire.
As far as quick assembly/disassembly goes, how about eight wing nuts and the turn buckle. you lay it in its side and disconnect the turn buckle, just unscrew it; and then remove the eight wing nuts. It's now in three pieces. To assemble just reverse the process.
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