I think the key to your wiring the TV (TeleVision this time folks; not Tow Vehicle) into your Concertone will be whether you have sound output jacks on the TV and a selectable auxiliary (Aux) position and accompanying jacks on your Concertone.
I have an Executive CD/radio/weather unit in my TT and always had trouble playing CDs with it. This spring, I bought a combination VHS/DVD/CD player. My (cheap) TV doesn't have any sound output jacks so I wired the sound output from the VHS/DVD/CD player into the Aux jacks (both use RCA type jacks) of the Executive. The sound through the TT's sound system is far superior to that of the TVs; in fact it almost gives a "surround sound" feeling when I have the both sets of speakers on (bedroom and living room in my case). I leave the TV set to channel three and use the tuner of the VHS player instead. This permits me to use the TT's sound system for TV sound also. Naturally, I play my CDs on the VHS/DVD/CD player instead of using the defective CD player on the Executive.
Because the Executive lacks a remote control, I have to get up off my lazy @$$ to adjust the volume (the TV has a remote). However, the remote of the VHS/DVD/CD player allows me to control all the CD functions which were manual on the Executive. So, I guess, it's a trade-off.
2009 GMC Sierra 2500HD | Crew Cab | Standard Box | 4WD | Duramax/Allison
2000 Jayco Eagle 266 | FBS | TT
1986 Coleman Laramie pop-up -- Still in the family!!!