Welcome to the forums! and congrats on being a new camper.
Since you are new, maybe you can learn from my mistake. As folks have said, usually your foot is the best way to hold down the connector. On my first visit to the dump station after our first weekend camping, I wore flip flops for the trip home. :S I learned real quick that shoes are the only thing you should be wearing when dumping. It's not that the hose popped up, but the area can get wet and you never know what you are walking in or around. It was just a bad idea. lol
Spap