Throttle valve adjustment

Vehicle is a 73 Sport 340 with the 200-4R transmission. Just finishing my restoration. Looking at adjusting the TV cable. Videos on YouTube all have slightly different methods. Some say extend the cable fully, open the linkage to WOT, and that's where the cable attaches. Others say to seat the adjuster, attach the cable, and go WOT one time and it will self adjust. Some show adding a small spring between the lock nut and the carb linkage. Others leave it out. Can any of you 200-4R guys who came ahead of me give me a definitive method that worked for you?
Does it have a factory GM tv cable? Those were adjusted at wide open throttle and push the button if I remember correctly. (that was over 30 years ago so I could be mistaken)