STOP!
You haven't given us your exact engine/drive model.
The people giving you advise are well intentioned but could be very wrong.
Volvo's can have 2 different flush systems. one of them can only be used with the engine off! You will burn up the impeller in the raw water pump if you run the engine while using this style.
I'm sorry but even though I worked on Volvo's for over 30 years "07 Hurricane 202 with 5.0gXi" really doesn't mean much to me. Really need more info to help.
The muffs I saw posted earlier won't work with an SX. Use MerCruiser muff. Put then on from the front or back, however they fit best.
If you have an engine mounted flush connection, yes it will be a standard garden hose connection.
But you can use muffs on all Volvo Penta sterndrives. The pump on your engine will suck up hill if it isn't shot. You may have to increase RPMs to 1500 if it's weak (but that's always a good idea when you first start an engine on muffs). Of course these pumps don't "have to be below the waterline or force fed" other wise how do all the wake boats and large yachts that have the raw water pump above the waterline work?
Read your engine owners manual! If you don't have one. they are a free download from --
Workshop manuals, owners manuals and service protocols for your engine. Get your manual and service protocol here.
www.volvopenta.com
Use your serial number to get the right one.