You might as well have cited 4chan with that link but whatever. No, it isn't known. What is known is that he had contacts who in turn had contacts in Mossad. And seeing both Epstein's vocal dislike of Israel and his vocal like for some of Israel's enemies (Russia in particular), I seriously doubt those contacts went any deeper than that.
[0] https://www.semafor.com/newsletter/02/08/2026/semafor-media-... (paragraph 5)