DHCP option 43 on Sonic wall for Cisco WLC and LWAP AP

we had sonic wall act as DHCP server and we multiple Vlans, for WIFI we are using Cisco WLC and LWAP access points and I am trying to advertise the IP address of the controller to the access points, previously, we were using windows server as DHCP and it works very well but now we want to do the same with our sonic wall