MicroVAX 2000

Saturday at the local swapmeet, I picked up a MicroVAX 2000. It is a neat little package, but now that I have it what can I do with it? And how do I do it? This one is a Model 625NT-AA, and comes without harddisk. It appears that there is a resistor board installed to provide a load comparable to the drive on the power supply. According to a rather sketchy spec sheet that I d/l'd from DEC, it can handle a maximum 318mb local disk. Based on the 53C80 chip installed, I presume that the drive should be SCSI. At the rear of the machine are three sub-D connectors, one each 25-pin, 15-pin, and 9-pin. What are their functions? The 15 and 9 are presently encumbered by a plugin box that has three RJ45(?) connectors. Network link? I have not had any real success in discovering anything in the way of documentation for this critter on DEC. Am I looking the wrong place? - don