Wow, that is one rusting hulk to start off with. Does look reasonably complete, however.
Yes, it's in a Universal type cab - I have a light blue one of those that's the same design with the power supply mounted sideways. I should have the manual for it also if one hasn't been scanned for it yet (there are several types of Universal cabinet identified by a "type code"). Let me know and I can scan it for you. The only difference will be that the pinout of the edge connector will be for Eyes (Bela to confirm the native Zac Eyes board matches the US version, since he has a Zac one). The power supply IIRC is a 1B1126 as usual for that era.
If you need pictures from this style of cab (sideways power supply variant) I can get them for you. Also, if no one has scanned in a good CPO for Eyes yet (Bela, do you have one that you scanned?) I can scan mine. Just let me know what information you need (PM or email me).
Great find!
Paul.