i just changed my steering wheel to the newer PSW non-electric one
i followed this DIY, which was great, but this part was not shown well in the pictures, and it was the hardest part
so i took some pics
what you are trying to do is to press these 2 metal bars in, to release the airbag.
one on each side
front showing where you need to insert the screw driver (shown with 2 screwdrivers just to highlight, you can do one at a time)
and this is what the hole looks like from the back
to me it's always easier to do something if i can visualize it, so i hope this helps you guys