Hi, happy to hear you hace chosen the vSZ-H with vSZ-D. This is a great and flexible solution, no matter the size. You can surely do this. I am not sure which version of code you are running this in, so i will give you general directions on how to do it.
If you navigate to services and profiles under any version past 3.2.1, you will find a location that says Ethernet ports, in 3.5, this is under system > tunnels and ports. You can great one and make it an access port, place the VLAN for the WLAN service you want to have this traffic bridged to, then check the box that says tunnel.
You can then go to the AP group or AP directly where you want this applied and overwrite the zone settings for the port in question. Be careful not to apply this to the PoE port as it would lock you out.
Once apply, traffic on this port would be tunneled on same VLAN as wireless traffic.