I see you have your UV-5R programmed with channels similar to mine, and like you, I absolutely am not transmitting on those channels, just listening as per the law ( 
). It’s definitely nice to have a single HT that can cover many radio licenses.
I have some extra RG58 leftover after I shortened my antenna cable in the truck, was thinking of doing something similar and making a short jumper to connect my UV-5R to the better antenna.