Obfs4proxy How to use?

Hi all.
I recently discovered a very interesting package in the openwrt repositories. This is obfs4proxy.
But the problem turned out to be that there is no documentation for it. No example config. and articles on its use.
I would like to test it with OpenVPN. And single mode like
iptables -t nat -A PREROUTING -p tcp -j REDIRECT --to-ports 10000

I am using TP-Link TL-WDR4300 v1 on OpenWrt 21.02.2
obfs4proxy Installed. But I did not find any config files on my router.