They win. They celebrate their victory.
Now, the Climax ends the adventure. Anything that happens after the Climax – like anything that happens before the Call to Adventure – ISN’T adventure. So, insert scenes after the Climax sparingly. The heroes do need a moment to hug and high-five and celebrate their victory. But that may be all they need if the adventure was just about going down into a dungeon and killing all the everything in there. But if something else was at stake – and that something was established in the Call to Adventure or during another turning point – that needs to be paid off as well. If the heroes were rescuing a village from marauders, they need to return to the village and be thanked by happy villagers. See how this works?
