I can't even see details on your image. Take a look at it. You have perhaps 1/6th of the image you uploaded that matters. I think I can figure out what you want.

I do not believe you can automatically do what you want. Once you have your TOC set up, you can edit it and add both headings to one line. This is a computer program, not a copy designer; it can't read your mind and it does not have any instructions set up to tell it to combine these two headings on one page into a single line but only on this page. Sorry.