We need that if we update the Quantity to our Warehouse i.e. https://www.shoppersspot.com.au/ site, then it should be updated to http://dolphy.com.au/ also for the same SKU.
Also, if any product gets sold out from any of these websites, then the quantity should be updated on both sites.
Warehouse - https://www.shoppersspot.com.au/
Another website - http://dolphy.com.au/