Desperate…Damon 2001 Intruder water fill location

There shoud be two ways to fill the fresh tank
On the driver's side in what I call the "Wet Bay" (Where you hook up hoses) Should be a City Fill or Quick Fill or some other valve.. Hook up like you were on a full hook up site and switch to "FILL"

On the passenger side is a square door.. Locked.. It takes that famous "Fits nearly all RV" keys And behind it is a cap about 1 1/2" in diamater.. That's the fill cap. for the "Gravity fill"