Capping a Side Spray Opening on a Moen Faucet
You only need to disconnect the spray wand if you have a portable connection to the faucet nozzle with the faucet in the on position.
If you connect to the plumbing so the faucet is in the off position you do not need to remove your sprayer.
Sorry I did not catch that sooner but connecting prior to the faucet it self is the same as every other point on the plumbing system. At the nozzle faucet on 100% hot I can see the sprayer not being rated for that combination of pressure and heat.  If you add an adapter to your hot line for the quick disconnect that would be the way around having to disconnect the sprayer.