99 V6 Alero: Mystery Hose

So my Alero has been leaking radiator fluid. The hose coming from the top of the reservoir is cut in half right around the belt that I'm also replacing. Problem is, I don't know where this hose plugs into. Hopefuly somewhere I can reach.

Also, as I've been reading on changing the serpentine, I'm on my way to the store to get a floor jack to support the engine in order to do that. Big fun.

That's how I discovered this hose cut in half.

Anyhow, can anyone explain to me where this hose is supposed to plug in? It's a skinny hose, the top-most hose closest to the back of the reservoir.

Thanks!

Alsom, the hose originates in the screw-in part for the cap of the surge tank.

The hose closest to the firewall is just the over flow hose and it connects to nothing. It just dangles there.

The two other smaller hoses at the top center of the reservoir go to the radiator and to the thermostat housing.

The hose closest to the firewall is just the over flow hose and it connects to nothing. It just dangles there.

The two other smaller hoses at the top center of the reservoir go to the radiator and to the thermostat housing.

Well that's good news, I still have to figure out where it's leaking.

Problem #2: I just got back with a floor jack, lift up the engine, one bolt still won't come off to replace serpentine belt, I broke a socket wrench yesterday trying to get it off, thought it would be easier with engine weight supported, no dice. Looks like I'm getting it towed from my house to the garage if I can't get that bolt off. I can't even get the two little nuts off. I've been reading this forum and it sounds easy as pie, but not practically, not when the bolts seem welded on. Any ideas?

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Re: Serpentine Belt Alero 2000
In order to remove the old serpentine drive belt part of the engine mount (passenger side) at the apron has to be removed. Just the top metal plate secured by the 2 large nuts and 2 bolts. Then just use a 3/8" drive breaker bar on the bottom of the tensioner assembly fitting to loosen the belt.
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That's the part that I'm having trouble with.