How do I join the corner of these two curtain wall sections that were cut out of exterior wall?

[daniel.kormos01]

Hello, if you look at the photo you can see what I mean. The curtain wall was placed inside of the exterior wall and then cut out of the wall using the cut geometry tool. I would like the corners of the curtain wall sections to join seamlessly.

Thank you!

[ToanDN]

Fillet the two curtain walls. Then use a void or opening to clean the corner of the brick walls.

[daniel.kormos01]

What do you mean by Fillet?

[ToanDN]

Fillet tool on Modify ribbon.