I assume you are talking about the two-way mounted plows for the B, although you may have only the right or left hand plow bottom. There were at least two manufacturers of those plows for the B. They are very different in how they mount. The most common are the plows made by Allis Chalmers. They would look like those in the link below. I have the manual for that type of plow in electronic format (adobe pdf) that shows all the parts and how the whole mess mounts up. This file is 12 pages long and is about 1.2 mb in size...would take a bit of time on a dial up connection but I could email it to you if that is the correct plow and you let me know it's OK to do so.
There is also a two-way mounted plow setup for the B made by WIARD Plow Co., Batavia, NY (out of business since the early 50's). I have these plows for my own '42 B. They are currently mounted and will be for about another month. I do not have a manual for them but I could take some photos of how they mount for you if you would like. If the plow you have looks like the ones in the photo in this post, you have the WIARD plow and not the AC one.
Let me know how I can be of any further help.