Beeping from front battery area.

[Jersey Devil]

I have a 2018 3731FL at home and my 50 amp service line has been disconnected for a month now.
So today I decide to look into my RV connect plug that plugs into the bed of the truck.The female 7 pin connector is from factory on new 2017 DRW.It seems not to be a good tight fit and power blinks on and off when traveling.
So I backed truck up and shut truck off and inserted rv male plug.I noted it is somewhat smaller in circumference then the female truck plug.
So to see if that’s the problem I wrapped some tape around the rv plug to tighten it up.
I plug in and was tight.Unlplug and notice a intermittent beep coming from the battery area in the front of the rv.Its beeping every 7 ..8 seconds now for a good hour and continuing.Battery is at 12:71 volts.
New to this rv venture so checked all and can’t find any issues.Thought maybe propane sensor?No it’s fine.
Beep only from front area where battery is.
If anyone has any advice I would appreciate it.