Drytak port fowarding to max br1

I have draytek 2912 and a Max br1.
The max br1 which is connected to draytak for wifi usuage.
But I have a printer which connected to Br1 wifi , IP 192.168.50.2.
My draytak IP= 192.168.1.1 and br1 which using WAN IP 192.168.1.10 from draytek 2912

Can I setup a 2 port forward in 192.168.1.1 → Br1 192.168.50.2 (printer) ? Then I can use WAN IP send the Prrint job to draytek → br1 → printer?

thanks