I think I better understand now.
You have already attached on of your wired B/W cams to a video sender, and the TV you view it on has a video reciever (the patio TV). However, you would like to see that camera on another TV inside the house (not the patio TV).
Lets call the camera on the video sender reciever camera A1 the wired only cam A2
On the TV with the B/W wired camera (A2), add a video receiver (for the other B/W camera, A1...you can use the one now on the patio). Use a appliance module (also set to A1) to turn the video receiver on and off.
Pick-up a Y shaped RCA plug combiner (Walmart, K Mart, Radio Shack). It should have two RCA female ends, and one RCA male end. Plug the RCA cords from both the wired cam and the video receiver into the female ends and the male end into the TV.
Now turning ON ether cam should turn OFF the other, and you can view both on the one TV.
KDR> Hope things are going well for you and yours. I am doing my best filling in for you.