LIkely you will need a search engine to track it down but I did recently post a brief how to on dealing with the TV cable. Getting the cable tension just exactly right is the hardest part and can take more than one try but it can be done. Locating the correct cable mounting bracket can also be something of a headache but they too can be scored if you are will to wander through fields of hulks and do some exploring.
The lock up provision comes as a default ability in factory 200 R4's and 700R4's. The electrical plug in found on the side of t-case is not to actuate it, it is actually to de-actuate it during braking. The lock up automatically resets itself when you accelerate again. There are pictures floating around that I took of what/where the factory switch for the lockup looks like/can be found.
As for there being no non lock up versions of the 700R4, we-ell, the factory didn't as far as I know but, if you go aftermarket then TCI offers a non-lockup version of the 700R4 under their part number TCI1060. They have it listed in the 2022 catalogue on page 143.
Nick