Winter package & water leak

[SSGNOYES]

I have a 2015 Dutchman Kodiak 221RBSL with the winter package and it has developed a water leak below the inside floor in winter package area in the rear. My city water enters for the rear side beside the slide. The city water has a white faucet hose connector that goes to pecks. I can only see the outer connection. Not sure if it goes around the back behind the lights up thru the the insulation then up thru the main floor around the shower to the toilet water heater then to the kitchen faucets. The water is leaking from the seam on the outer rear wall onto the valance then ground. Seams to be less of a leak with the water pump holding tank usage. Not sure hiw to access this area from underneath ? Looks like getting into the panel under the furnace iam going to need to dissamble the furnace cabinet ? No leaks on the inside floor anywhere? Always thought it was the Ac dripping but Nope its the city water piping before it comes inside. Greatly take any advise.