Senior Tech Team
Join Date: Sep 1998
Location: Mustang, OK USA
That is correct. The 697 housing has kind of a "double" boss for locating the ball stud. Otherwise, it is essentially identical to a 621 housing. I personally have never seen a 697 housing with the ball stud at the lower location, but obviously there were some.
With the ball stud located at the higher position, it is 100% interchangeable with the 621 housing. I have VERY closely compared the two side by side, and I can find absolutely no other difference except this double boss.