I replaced the intake gaskets and there’s a hose near thermostat that isn’t stay

What is your question?

There’s a black hose by the Thermostat that just plugged in, and when I drove my van it popped lose. And leaked anti freeze, and I can’t figure out how it’s supposed to be held in? I have pictures of this house. It’s black hose on the back side of the engine right to the left of where the thermostat is on the engine

What makes this problem better or worse?

Only pops out when I drive and it builds pressure

How long has your 2003 Oldsmobile Silhouette had this problem?

Just recently after changing the intake gaskets and thermostat