A series of custom made plugs to be sewable or soft.
Shapelock Sewable Breakout
This was used in the Puppeteer suit for the Language Game performance.
Nice because of the stretchiness of the cable and the sewability of the plug. This connection was used in the JoySlippers and Puppeteer Gloves projects.
>> Local 99cent store
>> http://cablescience.com/ (USA, will customize the cable)
Massage me Silicone Plug
Used in first version of Massage me. We shaped the plug we wanted from clay and then made a plaster mold to cast them with Dragon Skin silicone. This is a two component silicone that is mixed in a 1:1 ratio (equal parts), which makes it easy to use without precise measuring devices.
Smooth-on Dragon Skin Platinum Cure Silicone Q (quick) >> http://www.smooth-on.com/Silicone-Rubber-an/c2_1115/index.html
Instructable >> http://www.instructables.com/id/Massage-me-Custom-cable/
First hot glue around the soldered cable connection to ensure that these will not bend too much, since the silicone is very soft. Then place in mold and add silicone.
After the silicone had set we simply tightly sewed some fabric around the silicone and this was enough to keep it in place.