the tv cable is adjusted by connecting to the linkage on the carb/TBI/TPI and just pulling the throttle full open and releasing,assuming that it is still connected to the computer on the housing with a four pin connector.
I respectfully disagree with danhon on both his recomondations. You need your TV to carb/TBI/TPI set up properly. The TV controls both when and how hard your 700 will shift. I'm not a tranny guy but I have a 700 in my '69 and don't want anyone to lunch a tranny based on advice given here. Angles as well as pull make things work!!
Contact www.700r4.com they will work with you to make sure you do it correctly.