Relays are already registered in the public Tor relay directory. There are two sites to search the directory, Atlas [0] and GLOBE [1]. This is how people know how to connect with them. Tor has unlisted relays, known as bridges, primarily to make it harder to block entry into the Tor network.
The point is not that Tor relays are anonymous, but the traffic going through the Tor network is anonymized by bouncing between relays.
The point is not that Tor relays are anonymous, but the traffic going through the Tor network is anonymized by bouncing between relays.
[0] https://atlas.torproject.org/
[1] https://globe.torproject.org/