How to correctly limit balancing between parent proxies in 3proxy?

Question

proxy

Hello.
I want to set up balancing between several parent proxies using parent.
It is necessary that user authorization occurs on the next proxy, that is, on the one to which the redirect occurs. The current proxy must accept all types of requests: http, https. socks4, socks5. And then it must redirect and balance between several downstream proxies.
I thought to do this (correct me if I'm wrong):
auth iponly
allow *
parent 500 socks5 192.168.1.1 3128
parent 500 socks5 192.168.1.2 3128
proxy
socks
That is, I accept all types of proxy connections, but redirect them in the form of socks5, so that when redirecting, all types of proxy connections are correctly redirected.
User authorization should take place on the proxy 192.168.1.1 and 192.168.1.2
Or do I need to use tcppm and portmaping?
Thanks in advance for your clarifications.