Socks5Proxy host[:port]
Tor will make all OR connections through the SOCKS 5 proxy at host:port (or host:1080 if port is not specified).
Socks5ProxyUsername username
Socks5ProxyPassword password
If defined, authenticate to the SOCKS 5 server using username and password in accordance to RFC 1929. Both username and password must be between 1 and 255 characters.
These are used, when your Tor needs to connect through a proxy to reach the internet - not for Tor to provide a SOCKS-proxy.