Object placing position without blank space in middle wall

how can I place an object in to z axis if in right side of X axis has a blank space

Please add more detail to your post

Your post has been flagged since it is lacking detail, has already been asked or is easily answered using a search engine.

Please add more detail, for example:

Your post will be reviewed in 24 hours and if it has not improved it will be deleted.

You will, of course, be free to make a new post in that case.

It is ok but I need something different for geometry.


Please check the screenshot where I don’t want to place object upon the gray shade. can you please help me to find out the solution ?