OK, I took the leap of faith.........
And, I don't know about unscrewing a screw, but I was able to install (preliminarily at least) the mount from Kuda.
As the instructions suggest, you don't have to completely remove the dashboard piece to install the mount.
Using firm, but careful force, squeeze your fingers under the top of the dashboard cover (closest to the windshield) and pop-off the three tabs from their tab-holders.
Then gently pry off the two tabs just above and to the left & right of the radio face.
This should allow more than enough room to install the mount.
I plan on installing my Sirius Plug & Play unit & will install pics once I do so.
In the meantime, below are pictures of the disassembly & the mount. And yes, there looks like space within there to run a cable from the AUX input in the glove box to the mount and hide it relatively nicely.
Tony