As the last picture in the previous post shows I have two power cables exiting the pole. The plan is to use the second for an antenna tracking system in the future, but for now it will be insulated and used to block the hole.
Here is the entry point for the video and power cables just above where I plan putting the weighted shelf. I have not pushed the joiner all the way in as I need to file down the insert so that it fits snugly, but does not give me so much resistance when I want to separate the parts.
Here is another view where you can see the joiner sockets that will be secured to the upper section...
And finally the whole pole with the shelf on the base, which I'll mount (also to be easily removable) this weekend.