If you have the 1125CR, it doesn't make sense to run the circulation pump with one timer and the Stenner with another. The 1125 will control both, and you won't risk them getting out of time with each other. If you really want to do this, I think you would need the power source to 1 &2 as you have it. Then run black from the Jandy timer to 3, white from Jandy tied to white from stenner, black from stenner to 4. This would allow one power source to the timer, but the stenner would be controlled but the Jandy circuit. I'm not an electrician either, but I think this is what needs done.....
EDIT: I just saw the picture above...there's no power on #3 to pass to #4 (there is a switch that the timer turns on between 3 &4, for the #1 load), and you don't want to switch both power and neutral of the same load- there is a switch between 5&6 that the timer turns on, for the #2 load)