I didn't mount the hoses when I deleted the rail. I might have used a zip tie or two so they wouldn't flop around, but they are not that long or heavy, so they stay in place pretty well.
After running the original rail with an electric pump, I saw no benefit in having a return. It actually ran better dead headed, so when I went to rubber, there was no point in rigging up a return. The rail has a loop built-in to make the flow and pressure equal to both carbs when there is a return. The hoses don't have that, so any return would likely make the flow uneven between the two carbs. The car ran perfectly with no return, so why try to fix what isn't broken?