Cut 1×4” boards to length matching the length of the combined tops.
The wall cleat along the length of the table top
Mount the cleats to the wall using drywall screws.
Then, mount the desk tops to the cleats using steel corner brackets.
Steel bracket to fasten the table top to the cleat
Supported the combined desk tops on each end using the closet rods.
It’s a bit hard to see but it shows the cleat painted to blend in with the wall
Because of the wall cleats, we did not need to install a leg in the corner section to support the desk. This gives the desk a floating effect and makes the corner a lot easier to use.
When we picked up the three LINNMON table tops that we used for the desktop surface IKEA was sold out of all colors of the ADILS legs.
Our LA area stores weren’t expecting them for over a month due to the number of people setting up home offices and home-schooling. We didn’t want to delay the install.
I bought simple 1 3/4” wooden closet rods and cut them to the 29 1/2” length my wife wanted for her desk. I painted them white and used the closet mounting ‘cup style” brackets that came with them to hold the legs in place under the tops.