Zscaler integration with Netskope CASB

One of our customer is looking to onboard Netskope CASB. The customer has already Zscaler ZIA in place.
To feed the Netskope CASB with ZIA SWG internet access logs for Shadow IT discovery, how can we perform this integration.
Do we need to make use of NSS-SIEM or we can directly integrate with Netskope CASB to feed the logs.
Any help in this regard will be highly appreciated.

Log feeding through the NSS servers.