I assume your question refers to accessing/disconnecting the exhaust end?
If it is like many of the PITA through-hull drains and vents, Mainship does a horrible job of planning for later maintenance access and replacements. A few weeks ago, replaced my waste tank through-hull by removing a panel in the back of the cabinet next to the fridge. Then by wiggling my head and one shoulder into the small opening, I could J-U-S-T reach it with my fingertips! That was fun.
I have several more that need replacing that I have NO access to that will probably require cutting an access port in the interior bulwark.