We also have a 1993 E32. Ours is an E232. These are for the Mitsubishi 320 control. I don't know if you have the 320, 330, or the 500 series control. Please excuse the Base Parameters file, it is upside down in the pdf file. If you print it, it will make it easier to deal with. Also, this does not cover the options the machine has/had turned on in the control. You will have to talk to Citizen directly. Also, this is the generic E32 parameters. You should talk to Citizen to see if they have a copy of your machine's parameters, (serial number required to find them). If they can, keep the generic pages too. On our machine specific parameters, descriptions were in Japanese, but the values were English. Basically you will need both so you know what is what.
Also, you will have to to grid shifts once you get the parameters put back in. All in all, plan on spending 1 to 3 days getting everything back in to the control, and all the grid shifts correct.
I have been where you are going. It was not fun! (me--><--machine) Good luck!