Greg....here is a photo that was shared with the community on FB. I would be bullish that this is the correct approach as you can also see the poncho sticking out in some of the photos from Celebration on the FB build group. I also think that regardless if the Premier DT's were Anovos, it doesn't necessarily mean the construction methods are incorrect. Furthermore, it would stand to logic that the R1 TK's, Shore, Tank and AT-ACT driver/troopers had a suspender setup as the Death Troopers were designed first and concepts from that design was carried over to the other troopers in R1.
https://imgur.com/a/WRYbZeS