The prototype starts with a relatively flexible belt purchased from some random clothing store (woman's department). I removed the standard belt hook and replaced it with velcro. The vibrators are in little cloth pockets equally spaced and sewn in around the belt.
Some of the materials being sewn may be pretty tough. A thimble or some other digit protection would have been nice.
The interface between the belt and the circuit is 2 RJ-45 jacks. I chose RJ-45 jacks because I wanted cables that were flexible and had some patch cords that seemed like they would work well. Plus, I had the jacks.
There is a full res version attached. However, it only makes the construct more disturbing.