You are correct....the manual is a nightmare, especially for those of us not familiar with programming BCD switches.? I also believe there is an error in the manual in one of the mathematical?calculations they show.
You have?two programmed frequencies available, A and B.? A is the right half of the entire BCD switch row on the back and consists of two 8 switch groups and one of four.? I found it faster and easier to just alter the switches, starting with the most significant group of four (the 100's) on the extreme right (as you look at the rear) and get it set right.....for 40m SSB you may want 200 khz.? ? Continue working to the left with each 4 switch group (treat the 8 switch groups as two 4's) until you get down to the HZ group.? Repeat for Switch B on the left, again starting with the 4 switch group just left of the centre of that entire switch row, and working to the left.
This is harder to explain than it actually is!
Once you get the hang of what the switches do to the numbers, it gets easier fast.