Cloudflared behind HTTPS proxy

I have a macOS host that connects to the internet via an HTTPS proxy. It is a simple proxy that offers the CONNECT method to clients and does not try to inspect the traffic. How do I tell cloudflared on this macOS host that it should connect to the Cloudflare backend via the proxy, not via direct TCP connection?

Most articles that I find are talking about a (reverse) proxy behind Cloudflare Tunnel, not cloudflared behind a proxy.

Thank you!