Grip locking raptor hand palm

This is a very rudimentary version of a locking grip system for e-nable's Raptor hand. It needs to be refined a LOT, but I wanted to share the idea so that better modelers than myself could work with it. The pin slides into a modified palm, with the usual cordage running through it. A twisting or sliding motion would pinch the cords and hold them in place.
To do:
1.Refine cord holes to better match the existing channels
2.Develop a mechanism to hold the pin in a locked position that is eas