Integrated fridge and freezer, no units just end panels?

Hi, I'm fitting my wren kitchen all the units in one run are in and looking good, under the stairs I have a fridge and freezer under a worktop. However there are no units for the integrated fridge/freezer just the fridge/freezer two door and three end panels.

I'm a bit confused how it goes together and it's about the only thing there is no guide for. Do the end panels need to be scribed to the wall and floor and the battened to the wall to provide support for the worktop?