I think getting it back together as well as you can will be good enough. I remember when I was putting everything back together that I bent a tab on one side and I was afraid I had broken it entirely. I shoved the hose as far onto the nipple as I could and at least one side engaged. The other side might have as well, but I kinda doubt it. I don't know what the hose is for specifically, but I did this fix more than three and a half years ago and I haven't had another problem with it since. In fact, I haven't had the CEL come on at all since this issue was fixed.
Maybe someone else has better information about what it is or how secure it needs to be. If not, I wouldn't worry about it at all.