First you must install the Cleric and Healer Culottes from Nyaughty's Pantsu ( https://www.xivmodarchive.com/modid/6971 ) before installing my mod, as my mod is simply a transparent edit of the texture of Nyaughty's mod. You may install the other parts of Nyaughty's mod too, and I recommend doing so as they're hot af, but only the Culottes are necessary for this specific mod to work.
In addition to the transparency shown in the preview picture above, there is also a hole in the rear for easy access as well: https://i.imgur.com/0OPxQqF.png
This is my second uploaded mod. I've shared it with a few friends and following the above instructions should work. It did for them.