I’m not sure if your shower is one of the type that was discussed in a thread about the shower walls and whether they were supposed to be free of seal to allow moisture to escape from behind the shower wall. You may want to check with Jayco before you make modifications to the shower.
2018 Jayco Greyhawk 29MVP
2019 Jeep Sahara Unlimited
2011 Cyclone 3010 Toy Hauler- Sold
2014 Chevy Silverado Duramax LML -Sold