>The two original battery compartments under the deats are vented,
>they use a small hose attached to the vent on the battery to vent
>outside the van.

Heh.  Well, my starter battery didn't have a hose attached to it when
I bought the van.  I'll have to look into that.

House is the hose routed?

My new SRM-29 doesn't have anywhere to attach a drain hose.

As for venting the compartment: It's well vented to the interior of
the van, which is also true of the stock battery
compartments.  (Unless you tell me they also have an outside vent, in
addition to the drain?)