Sorry Jim. That Oregon stuff there is wrong. The A041/K041 and A064 pages you linked to both show a pic of an A061 mount bar (in error).
The D196 page you linked to shows a pic of a D176 mount (in error). The A061 is very distinctive. 1/4" open ended slot, with a larger square section in the front for the square tensioner stud on those saws.
The D176 mount page you linked to shows the correct mount.
This is the A061 mount: