I'll try to help you.
I have the Hobby Craft AS90 (It's the Trumpeter kit under the HC label) To be fair, I have not built it yet, but I am looking at the instruction step which you have mentioned.
It is showing you some of the parts already in position.
If you were sitting in the driver's seat, parts A22 go on the left side and parts A23 go on the right side.
You do need to put all of parts A22 and A23 on at this time in the construction sequence. That should be six each of the A22 and A23 parts.
I hope this helps.