RP802-804 are resistor packs working as passive termination for the integrated SCSI bus. They are required when only internal OR onlx external devices are connected and must be removed when both internal AND external devices are present.
You'd need the once common 220/330 (or 221/331) terminator packs - if you can't find any, just plug in a 25pin external terminator (active type preferred). :-)
