intake pump hose came out of fresh water holding tank

[mw2307]

I am very new to trailers so just finished winterizing for first time with help from a more experienced friend.

In the process of trying to run antifreeze from the fresh water holding tank we turned on the pump and could hear air moving but nothing from the holding tank. Connected a secondary hose directly to the inlet side of the pump and it sucked the antifreeze directly out of a jug of antifreeze and presurized the system.

We then reconnected the hose from the tank and still nothing. Also tried to suck through the hose and only got air. At that point noticed the hose was not attached to anything under the floor and pulled it out and the end that should have been in the tank was totally dry. So hose was not in the tank and how do you fish a hose back into the tank from the pump or should it actually be attached with a fitting as it was not.

I have a 2011 Keystone Cougar 276RLS.

Totally new to this so need all the help I can get and there is probably a simple answer.

Thanks