That design is meant for use mounted to a surface you want to pass through like a case wall or something. For a QDC that attaches directly to a radiator or other components you want this type
with the G1/4 male threading
If I was using QDC's I would personally get the ones that just have male and female G1/4 threads so you can use your own existing fittings to match the rest of the build
Like say this one attached direct to the rad
and this one fits into it
and it has a female g1/4 thread for one of your fittings to attach hose with.
Otherwise you are just buying the same things with swiftechs fittings built in.
Like this that fits 3/8 x 5/8 tubing
http://koolance.com/qd3-ms10x16-quick-disconnect-no-spill-coupling-male-for-10mm-x-16mm-3-8in-x-5-8inEdited by Jakusonfire - 10/5/15 at 11:31am