Kitchenaid K5SS trying to get housing off to access gears??

[970148]

I have followed the video as to getting the housing off Except there are different screws on my mixer than shown on eRep's site. I have the front lifting but the back housing is still locked into place by 2 screws that I have no access to?? If you look from the back inside the housing you can see these, but I have no way to get them out Mybe these pics can help. The four big screws on the bottom I can not break. And they do not appear to be holding the housing. ANY HELP.