Also Dell in their infinite wisdom bent all the contacts on the switches before soldering.
This is not "Dell".
I have done several of these and it varies greatly. The tech building the board bends a few legs down to hold everything in place to get started.
4 near the corners and a couple in the middle would be plenty, and they do not have to be bent over hard. Sometimes they got very zealous about it, but who ever thought that anybody would want to remove them?