Here are some pics of my install...
I wanted to mount the battery on the frame and the board up on the roof, but I could not get the shell on right. I had to end up putting both in the shell side by side. It's a tight fit with minimum clearance for the air to get through.
Here I removed two of the eight screw posts to accommodate the battery and board.
1st Try... Did not fit well
2nd Try... Better fit, but less room for air flow cooling if needed. I butter run 'em medium to slow and see.
I used an RC (Futaba style connector for the motors and JST plugs for power and speaker. I just reversed the plug ends so I could not make a connection mistake.