This kit is for connecting an output of a breadboard trigger to a flash unit having a PC jack. If your flash unit doesn't have a PC jack but does have a hot shoe, you'll need the PC cable kit/hot shoe adapter combination. Note that the combination is $1 less than buying the kit and adapter separately.
The flash trigger cable kit includes a connector for the PC jack, 3-ft of 2-conductor cable, heat-shrink tubing, and pins for easy insertion into the breadboard. Assembly is required.