you can get extension leads for the balance plugs. This way you would not have to move the batteries every time you want to charge them.
I will however say that considering Lipos can catch fire when charging I personally would not be charging them inside the plane. For this reason I only use life batteries where possible. One of my ECU does run a lipo which I remove for charging.
To save you some frustration from buying the wrong plug if you mention the brand of your battery as stated, someone on this forum will be able to help you tell you the exact plug to get.