Thread about the connector here: https://www.diynot.com/diy/threads/e...nector.417453/
Best to read through that and the associated links to see if your questions are answered in there. What I've just read suggests it's a flood limiting valve (so long as the excess water is within the device) and can only be replaced in its entirety. No mention of how to connect to it, though if you can find the manual online that should help.
I just searched for the number on the device: 40010188