trying to add pipeline using on prem sql server - getting azure sql error instead

this is a bit of an education for me.   I found this by navigating to admin powerplatform.   I was surprised to see the same "on prem server" also being where the "gateway is installed" (do i have that right?).   I looked inside the file to find "sqltrustedservers".   It wasnt there.  I was also surprised to see its online but not enabled as shown in the image.  What does that mean, especially not enabled?   I made a copy of the config file but will stop short of following the instructions till my network guys are on board with this.  I'll see if i can learn somewhere how/where a node called sqltrustedservers would be added.   its kind of weird to think the entry would basically be saying "trust myself" in terms of which servers are to be trusted.  I'm also starting to wonder if a gw cluster is different from the gw itself and maybe i'm barking up the wrong tree.   cluster sounds more like a failover thing.