Some pictures of the electronics install on my Baby Baron for Tom Holmez (via question on my YouTube video).
Two different methods due to motor size and required battery placement.
The smaller motor version
The RX goes on the Velcro (not installed at the moment), ESC jammed into the pod and battery on pod Velcro.
The larger motor needed battery back farther back so I came up with this.
Battery has Velcro on sides. I had to remove a bit of foam under the Velcro for my battery to fit. Works great.
To find ideal placement, temporarily place items where you want them and then move them around to get CG right. Even the pod can be shifted forward and back a little to help if needed (just may need new holes poked through pod). Working upside down would be helpful. Be patient as getting the CG is very important on little planes.
Hope this helps a bit.
Cheers,
Aaron