You can plug the power source into the throttle port and the plug the bind plug in. nothing needs to be connected except the power and the bind plug, then you can plug everything back in.
Just a shot in the dark, but can you move the bec to an aux port long enough to bind, then move it back?
Or bind the RX with it plugged into another ESC or RX pack, than move it back to the glider. I don't think it matters what's plugged into the servo when binding.