Gentlemen, Thanks.
The magic bullet here was the 0 based Attribute. I had it stuck in my head that it was going to be some 6 digit mystery number. Also, more reading of the size and offset property of the datablock, allowed me just to grab the bytes I needed. It also didn't help that I got some bad information from the vendor; which I will share with them. To many rabbit holes.
Although, upon discovering my bad information lead me to a new mystery.
Looking at the data linkages tab in V8i I could see the DMRS and the last word contained the Support Modeler model reference. But, the record reference for the cell was in another hex string.
The question now is...is this also somewhere in the DataBlock? To I just need to find the ID for this?
See the image below, the 5th work has the record key. I though the Type might be the AttributeID, but it is not.