The gap to the right hand side of the range should be filled with the unit that you already have there. It should go right into the corner and have a door on half of it if that makes sense. So depending on the length, a 1000mm straight corner base carcass will most likely have a 400mm door on it which means to access the corner you will have to kneel down.

When I plan corners I always try to fit in a 900L shaped corner base which means you can access the whole corner as it has 2 x 316mm wide doors. In your situation with the range there you don’t have room to do this.

I presume I’m reading the image correctly.