No AMS is needed for dual-color print.
The stand is designed to hold all versions of the Apple Watch from the SE to the Ultra. Accents on the front & back are printed separately and can fitted in after being printed.
Recommended that you use my print profile, but if not make sure Arachne wall generator is selected for both the stand and Accents
Accents are a tight fit so position them into place and push down on a hard flat surface for a flush fit.
This is the final design in the series of watch and phone accessories - check out the other designs - links below
https://makerworld.com/en/models/127277#profileId-137702