HOW TO ADJUST 65 DART AUTO SHIFT CABLES?

Good morning,
Do you have any fool proof ways to adjust the shift cable?
Motor and trans are rebuilt, less the 200 miles ago.
Recently lost "start in park" and Reverse. Spent half of Saturday adjusting; used light to check Park & Neutral, worked well Sunday.
Tuesday morning wife has same issues again.
Book says something like "put in low, and back adjusting wheel out 4 holes".
Which way do I need to adjust for No Reverse?
Any suggestions other than dropping pan and verifying positions?
thanks

Not too long ago I saw a video on Youtube about that, so you might want to search that.
It was very specific about how to adjust those.