See here for a wire diagram for a blind corner with left return. I do not have access to a wire frame for that exact cabinet code you listed, but that one assembles the same, just doesn’t have the integrated filled protruding from the face of the blank panel.

Essentially the blind corner cabinets assemble just like any other cabinet. The only difference is that the blank panel is attached to the face of that cabinet using the regular confirmat screws provided, and overlaps the left side of the cabinet by 1”. This overlap eliminates issues with drywall corners that have a round to them. The door is then attached to the back side of that blank panel using a regular hinge plate and a special blind corner hinge. The blank panel IS NOT included with the cabinet case parts. It is wrapped up separately as it is made from matching cabinet door material and much more susceptible to damage in transit.

If you are missing a cabinet case part, be sure to search through the shipment as that single part likely had to be remade and inserted elsewhere in the shipment since it did not pass quality control with all the other pieces. Do not halt assembly of other cabinets being assembled as it could very well turn up after you have moved through the majority of packaging. If you are nearing completion and still don’t have the part, then please email clayton@barkercabinets.com for a replacement part. Should only take a few days to expedite and ship out as needed. Thanks!