Here's a picture of what the end of the hose looks like with the attachment taken off:
From what I remember, you have to pull BACK on the sleeve around the joint in order to pull the end attachment off.
I have those two apart I was trying to get the piece connected to the hose off. I'm now guessing I don't got to, see this is what I was trying to pull apart.
Normals 1.3
Spider .1
Carpet Python .1
Dog APBT .1