I have a C which has an internal fuel pump and am not familiar with the R but I believe bikes with internal fuel pumps should be the same in this respect.
I am not sure which hose you are referencing in your picture.
The hose connection in the red box is the return (low pressure) and in my experience, doesn't need a disconnect, unless you remove it while the tank is extremely full.
If the tank has only a small amount of fuel in it no fuel spills from this return line on my C.
The hose connection in the red box is the feed (high pressure), at least on my C there is no need for a disconnect. When disconnected a few drops will come out but that's it.
I had the tank on and off of my C probably a dozen times at least recently while flushing/changing the coolant and didn't spill more then a few drops of fuel total and I dont have disconnects.
That said the article you are referencing with your picture has a link at the bottom to info on disconnects.
from the 02-04 link:
"I do suggest getting the fittings with shut-off valves on both the male & female ends so there is no leaking of fuel from either end when disconnected.
You can just do the return line or like I and several others have done do both return and output fuel lines.
Every time you undo the Allen bolt on the fuel tank or fuel rail you should use new aluminum crush washers, if you don't, after a few times of reuse they will probably leak if only torqued to the OEM spec of 19ft lb at the tank and 9ft lb at the fuel rail (the fuel rail banjo is the one that usually leaks).
For the return hose use the 1/4"
and for the output hose 3/8"
Get some good SS hose clamps for the barbed ends.
Here is link with pic of "How To Do" for the return line the output line is the same only a bigger hose. "