Complete System ?

Origin of image - google images.

Another 8H Front Image

Lifted without permission -- google images.  For build reference only.

Completed Backplane Card

704 solder points and a few hours later.  I took a 15 minute break to sit with my x GF, other than that it was some seriously dizzy soldering, for a few hours.  I will give the backplane the red-pencil check tomorrow under a magnifying glass to make sure I didn't miss any points.

BTW, I am using 63/37 Rosin Core solder - .020    This is the same that I used on all 3 Apple-1 clones.
This stuff is poisonous, (lead) so make sure you have a window open or a fan or something for adequate ventilation.  I prefer it because it's easier to work with than the "safe" stuff.... but that's up to you.

As you can see below, I've inserted the Front Card into the BackPlane Card.  Nice fit, but as Mike Willegal mentioned, there is some play, so you will probably need PCB Guides (I am shopping for mine now, or may make my own).

Front Panel

Because I haven't soldered in about 2 years, I decided the backplane might need to be the second component to work on.  So I went with the Front Panel sockets.  I tinned the tip of my iron for the first time in ages, cleaned the PCB with rubbing alcohol, and went to work.

I've started work on the backplane.  I've taped my connectors with masking tape, alternating each row.  8 in the first pass, do some soldering, then clean it up, and finish up 8 more on the 2nd pass.

I was out in the Bay Area back in mid Feb 2013 ... here are a few pics of the SCELBI 8B (Business) on display at the Computer History Museum in Mountain View, California.

I've ID'd and marked all of the boards.  Found that the cinch connectors I had from my Apple-1 clone projects fit the backplane so I'll use these.