OmniTIK U-5HnD

I have just ordered 2 of these and I want to use them as an accesspoint and switch. As default port 1 is external interface of the OmniTIK U-5HnD. How can I configure it to be a member of bridge-local and work as an regular switch port? I want to connect port 1 to my firewall and use the rest of the ports as a switch on the the same LAN as port 2-5. I don’t want the OmniTIK U-5HnD to act as an router.

Thank you in advance.

If I understand correctly you just need to bridge ports 1-5 together with the wlan inteface.