Katie,
The 325 requires external Rodgers amplifiers on the main and flute channels to drive appropriate speakers (not including the Leslie channel). The connections on the output chassis are what are referred to as line-level, i.e., low voltage for such a purpose, so they can't drive speakers directly.
I have a 325 Technical Manual hardcopy, but I haven't scanned it into PDF format yet. Maybe someone else out there might have an electronic copy. If you don't mind providing your location, I might be able to suggest someone nearby to help.
I owned a 325 as my first Rodgers, which got me started on restoring vintage Rodgers analog organs from the 60s and 70s. I think it's a great instrument for its size and age. I currently own 36D/C and 660 model 3 manuals, and a much newer 760 2 manual with MIDI.
-- Tom