Nixdorf LK3000 (OT?)

I hope this qualifies for a classic computer. If not then wipe it out. I have a Nixdorf LK 3000 and LK 3500 module that I was preparing to put on E Bay but discovered it didnt work. Examining it I discovered NO BATTERY, Inside there are a blue and a red wire that must have originaly gone to a battery clip. But I dont know what size or where it resided. I dont want to get rid of this without fixing it first. Does anyone have any info on what the battery (pack?) looked like on thei personal computer? I am glad I decided to try it out because I had remembered that it DID work. Shows what 70 years will do to your memory. I dont even remember removing the battery pack! -- Jim Isbell "If you are not living on the edge, well then, you are just taking up too much space."