You need to get to them from the back. In the compartment under the driver's side bed, you will see a panel on the left hand side of the outside wall of the compartment. Should be 4 screws. Remove them and you will see the back of the water inlet panel. Check to see which hose is leaking and tighten. If the issue is not right at those lines connected to the panel. Take to your RV dealer, the leak may be the panel itself and/or a bad connection in or to the PEX plumbing system itself.
You should still be warranty.