Unless I am having air intake problems (air leaking into the hose from the connection) I just get a hose that is slightly smaller ID than the OD of the spur it is attaching to and let friction to the best. But I keep a couple of SS hose clamps around to tighten things up if I see bubbles forming at the attachment points. for hot liquid you might want to use something more secure though. if you have the coin quick connects sound like a great idea. I can’t imagine it matters which has the male and which the femal so long as everywhere you are going to attach a tube to has the same gender (i.e. put the female on the tubing and male everywhere else)