FlexConnect / Local Mode Switch settings difference

[CCC3]

backbone - C9800
       l
Poe switch
       l
     AP

When it's the most basic structure

when flexconnect and local mode
How are the settings different for the backbone/poe switch?

For example
When flexconnect, the backbone and Poe must have the ap management vlan and SVI, the user band vlan and SVI, and set to trunk at the port where the Poe switch's ap is connected (allowed is optional)
Can you explain it with this example?

[srimal99]

@CCC3 Cisco has a good article about flex connect link provided below 

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/213945-understand-flexconnect-on-9800-wireless.html