You can define custom Text, Number and Checkbox fields that will be synced back to Reservation Contact records that are being created when making a booking from the widget. These fields will be presented to end-user in the checkout flow, when filling in their personal details
How to add fields
Create the custom field on ReservationContact (B25__Reservation_Contact__c). The following fields are supported:
Add the field to the External Client Fields field set on the Reservation Contact object
The field should now be visible in the Other section on the widget.
When a users goes through the booking process, any data filled in in those fields will be stored on the Reservation Contact record that is created under the Reservation record