They are not a quick disconnect fitting, they have a clip that looks similar
to door and window cranks that they used on the older GM cars that need to be removed and then the line is pulled out, what I would like is a fitting like that on the rad. side and then a barb fitting that fits in the cooler hose on the other end, I would rather not use a compression fitting if it can be helped, in one of the links you sent it shows a picture of the clips. But I'm not sure that I seen any of the fittings??
Ron