Well, I finally finished my install. I used the void in the center console, as described by Wanderlost Overland, but I changed the mounting points for the connectors to a different location. I went with the low cubby in front of the shift lever. The 3 foot cable lengths that they had spec'ed in their YouTube posting were long enough to reach.
Other changes I made - I vampire-tapped the auxiliary power socket that runs to the center console. Adding a power distribution system is on my list of things to do real soon now...
Part of the decision on the connector location was driven by thoughts on where the Mic Cord would have the least conflicts with coffee cups. And since I'm also considering that cubby for a set of rocker switches, the connector could easily be moved forward at that time. But all also admit that since cutting these holes will be the first non-reversible mod, I wanted to go for an unobtrusive spot...
I'm not sure how or what I was measuring when I thought that this would work (as shown in the first picture). If anybody else tries this, do not place them as shown there!! The air duct behind that piece was much wider, and closer than I realized.
I wound up moving the RJ-45 plug to the far left, and even then had to apply significant Dremel-tool and X-acto knife surgery to the plug. I moved the USB power port to the far right, and turned it sideways to ensure no conflict.
All of this required a healthy application of epoxy to hold the RJ45 in the new position, since I'd carved away extra plastic, and black duct tape to cover up the empty space. Images of the results of that carnage are further down.
I'm happy with the end result. And, happily, the evidence of this experiment is hidden away where it can't be seen.