No problem, just pull the hoses off and join them with a piece of copper or plastic pipe.

You could try some Radweld or similar, then you would retain a working heater.

Otherwise, with a cold engine, remove the 2 heater pipes from the connectors at the bulkhead where they pass through to the heater matrix. Find a piece of copper pipe that is a tight fit into the 2 pipes & join them together. Secure these with 2 jubilee clips. Check the coolant level & recheck after the engine has reached normal temperature.