[ShrimpBurrito]

You could also pull out the shower box as bill described, and instead of cutting the tubing to cap it with a Sharkbite, you could just screw in some male nylon plugs. Also very easy to undo. That's what I did with mine when it leaked on a trip. Frankly, those plugs are good to have on hand anyway for any of the supply lines. If a faucet nipple breaks, you can't use the water at all in the TM without that leaking, so removing the line and screwing in the plug is a temporary fix so you can at least use the rest of the water lines.

Available at a hardware or plumbing supply store, Amazon, etc.

Dave