Here is a little how to , on a fairly frequent question. Due to a variety of reasons, damaged hose, desire to shorten hose, worn connector, making an extension hose, etc, it is sometimes necessary to remove and replace the hose end connectors.
Both the tool end and vac ends work the same way.
1. Locate the two small locking tabs.
2. Use a screwdriver to press them in and back. This will allow the retaining ring to slide back from the connector.
3. Pull the main connector body off.
4. The hose end piece is threaded onto the hose. Unscrew (left hand thread).
5. Replace bad parts , cut hose to length (utility knife works well) you don't even need to be picky about the cut, just cut through around one of the spaces between ribs (threads).
6. Reassemble.
Seth