The catalog number is 803187, the 803 probaly being the series of converter. I downloaded the service manual for my 1971 807 PI converter so there may be hope for a manual for that converter.
As was mentioned it's all pretty generic. Your AC line feeds the main breaker and the fuses protect the DC circuits.
If you use the converter, I'd suggest to keep an eye on your battery fluids. The output is probably a constant 13.6 or so DCV. PD did sell an add-on charger board for some of these older units and that would make the charging circuit variable. I don't see it installed on yours.
