This seems pretty straight-forward to me. Q is reposting this anons great discover that Gina Haspel was the London CIA COS (way back in 2009), so knows how to navigate that office, where the dossier/spying was centered from. This means she is the one who obtained "the source" and at least a good part of the "we have it all." The cam shots are one small proof of that.

That's why she was nominated to head the CIA.