How to correctly configure tcppm with authorization by IP in 3proxy?

Question

proxy

There is machine #1 with GRAY IP 1.1.1.1 and internal IP 192.168.56.2
There is machine #2 with WHITE IP 2.2.2.2 and internal IP 192.168.56.1
Machines #1 and #2 are connected by internal network
There is machine #3 with WHITE IP 3.3. 3.3
I want to give access to machine No. 3 to 1.1.1.1 through a proxy with authorization by IP 3.3.3.3 (so that only this IP has access to the proxy)
machine No. 1
proxy -i192.168.56.2
machine No. 2

auth iponly
allow * * 192.168.56.2
tcppm -i2.2.2.2 3128 192.168.56.2 3128

This option allows access to 2.2.2.2:3128 from any IP, but I need access only for 3.3.3.3
What should I add?