There is enough slack on ours to reach behind and unscrew the plastic fitting from the waste flush hose connection.
We also have a compt light on the left (or toward the coach front). There was enough slack to disconnect that too. I reinstalled with waterproof 12V automotive plug/socket. Easier disconnect if/when I go back in.
If it applies to you, all that was unneeded for my original plumbing task of replacing the tank flush backflow valve. Removing the vanity sink made that a piece of cake. On the other hand, removing the sink was not.
Fair Winds and Following Seas