IF they exist, they will be at the back of the WH.
Find the cabinet or bed on the inside of where the WH is mounted outside and start digging.
Mattress, cushions and access panel have to be removed.
Once you get to where the cold water in and hot water out lines attach, there should be 3 valves...
Always cut the green wire first.
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!