On both my Dutch Stars, that blower motor was inside the coach and requires the lower section of the dash, in front of the passenger seat, be removed. I was almost able to get it out, by removing the drawers in the center of the dash and reach in and remove the bolts. Unfortunately, there wasn't enough space to back it out before it struck the backside of the dash. So check via the drawers, if you have some.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor