user guide for AC2200

I just purchased an Orbi AC2200 RBK33. Is there a user manual for this device? I have seen the info on-line and it is really inadequate!

I want to set this up as an Access Point from my Netgear R6300v2 router. I cannot find any diagram or information about how to do this. I see how to set up as an access point but not how to attach to my modem or router.

The only model I can select for this message is the AC3000 RBK50. That is not what I have.