The "lift" (both manual and hydralic) mounts under the rear seat, however in only lifts the implements that are specific to the "B". It had a full suit of implements that only fit the "B". Otherwise you just used the drawbar for trailer or horse drawn equipment like old mentioned.
So far for my "B" I have found:
2-way plow (manual lift) There are pictures in the archive showing my B with the plows mounted
Spring tooth/field cultivator
Allis 40 All Crop
Would still like to locate:
Planter Parts (mounts on the cultivator)
2 Row "Drill Planter" with the proper lifting hookup for the "B"
An allcrop grain drill (5' width or less)
Grader (similar to the "W" speed patrol but with the "B" platform)