No slight intended.
I always considered properly adjusting the shifter cable as a critical part of the install, just as important as having the correct fluid & fill level.
A shifter that is out of adjustment can allow the shifter spool valve in the transmission bleed pressure off the clutches & lead to slipping & burnt clutches.
The adjustment procedure is outlined in the manual & is simple -IF the parts line up. Might get time consuming & aggravating if something needs to be modified.