I am going to keep the wiring on the outside of the control stick. I am using a connector that still fits through the control stick (at least the straight part of it) so if I ever needed to service my control wires it wouldn't be much of a problem. I chose some 7 pin circular connectors from Amphenol (APC1629-ND). The really great thing about these connectors is that they use same High Density pins and sockets that the DB connectors use for most of the other avionics.
The 7 control stick wires fit nicely into the connector, and the connector is actually small enough to fit through the control stick in case you choose to pop a hole in the control stick and route the wire inside of the stick.
The wiring pattern for the control sticks are as follows:
Pin | Stick Wire Color | Switch | Airplane Wire |
A | Blue | Trim (Up) | Red (VPX Trim Up) |
B | Brown | Button (Black) | Not used |
C | Yellow | Trim (Right) | Black (VPX Trim Right) |
D | Purple | Trim (Left) | White Black (VPX Trim Left) |
E | Red | Button (Red) | White Black (CWS/Autopilot Disconnect) |
F | White | Button (PTT) | White Yellow (Pilot) White Brown (Co-Pilot) |
G | Green | Trim (Down) | White Red (VPX Trim Down) |
H | Black | Ground (common) | Black (GND_ControlStick) |