As far as installing a soap dispenser, the good news is that basically all you need is an open hole to mount the unit. If you don’t have an open hole, you’ll need to reconfigure the faucet and deck-mounted spray head.Some people change the entire faucet to a pullout spray faucet. Since a pullout spray faucet is a combo unit, it will free up a sinkhole for the new soap dispenser. For less money, I’ve also seen plumbers remove and cap the remote spray hose and head, then install a “swivel spray head” at the end of the faucet spout. Or you can simply drill a new hole in the sink or countertop.