Does anyone know where I can get a wall-mounted plug so I don't have to open the engine/tender when I want to charge the battery?
The 2200mah, 11.1v Lipo battery I have has what they're calling a "TP style 4-pin connector" that plugs into the balance charger. I want a wall/bulkhead-mounted connector so I can plug the battery into it from the inside and then connect the charger to the plug on the outside. Here's a photo of the battery, the white plug is the one I'm talking about.
There are no bulkhead connectors for the balance leads available that I know of, presumably because the RC world recommends removing LiPo batteries to avoid losing the model if there is a problem while charging.
Consider also, that your model will be inactive the entire time it is being charged. Removing the battery and swapping in another one allows you to keep running.