(Reference) Page 12 Section 5 of manual for instructions.
Set the trunnion at 90* degree and check to ensure squared with table
Have to loosen the keel (4 screws) to move the keel assembly left/right to center it with the slots.
Use a machinist scale or “Allen” key/card to check “parallelism”
Once setup, tighten all screws and adjust angle indicate piece (at front trunnion block)