Micro PDP 11/73

Well, I decided to take the day off, so what should happen but that I get email from work teling me that someone has left a PDP 8/75 in a desk with floppy drives on the loading dock (which is very very close to my office...). So, I come in, and of course its not the pdp 8/a i'm expecting, no... Its a Micro PDP 11/73 with a couple of other rack mounted things that i'm guessing are modems or some such (non DEC). Anyways, I take the computer and rack mounting parts, but now i'm full of questions. For one thing, whats the proper way to get to the cards? It looks like i may have to take apart the back end of this thing, which contains about 9 male DB25 connectors and a 2 digit LED numerical display... So far, I can tell I have the KDJ11-B CPU board, which is quad height unlike the A version which the web tells me was dual height. I can see there are cards in the upper 4 slots of the bus, and that there may be a total of 8 slots. Anyways, i'm afraid i'm not knowledgeable on this 'modern' DEC stuff, so any help, like sugestions on the proper way to open the back of this thing, would be appreciated. -Lawrence LeMay