Thank you for sharing more pictures! I love old central vacuums, and this has to be one of the oldest out there.
I would really encourage you to see if it runs, if you haven't already. Just a quick "pulse" on-off should allow you to safely see if it runs at all (or doesn't, or blows the fuse, etc.), and if you get some noise and movement, then turn it on and watch what it does. Those big old motors usually run forever, and I bet if you hit the switch it will come to life just like it did 100-some years ago.
Keep us posted!!
-Owen