http://l3tczdiiwoo63iwxty4lhs6p7eaxop5micbn7vbliydgv63x5zrrrfyd.onion/faq/misc.html
If you verified that Privoxy and Tor are
working, it is time to connect them. As far as Privoxy is concerned, Tor is just another proxy that can be reached by socks4, socks4a and socks5.
Most likely you are interested in Tor to increase your anonymity level,
therefore you should use socks5, to make sure DNS requests are done through Tor and thus invisible to your local network.