Keep hearing horror stories about changing headlight lamps on newish cars. So here's a good news story.
The dips on the new to me Boxster were a bit dim, so very likely original.
To get at them, you merely peel back the boot liner, and insert the special tool provided in the tool kit (just a long box spanner) and do a half turn. The entire headlight is pushed out of its mounting.
Take it indoors, remove the four screws from the cover on the back, unclip that, and you've got access to all the lamps.
So much easier than trying to change them with the light unit on the car.