Hi guys,
I am in the process of upgrading the volume pot in my preamp from the one on the right to the ALPS unit on the left:

What I need to know is which terminal is which. I've played around w/ the terminals and a DMM (and a battery) and I can't figure it out.
Here's a pic of the old pot in the preamp:

I'm thinking they'll be the same as the old one, but that seems like a risky guess.
Any help would be appreciated.