EX3700 configuration in bridge-only mode?

I have an EX3700 range extender that I am using to bridge my wifi network to a wired security camera. I don't actually want the EX3700 broadcasting wifi — it generates interference with my primary network and my coverage is good enough that the additional signal isn't necessary — so I turned off broadcasting of both 2GHz and 5GHz networks on the EX3700. However, that has now made configuration of the EX3700 inaccessible as apparently the only way to connect is via the self-broadcast SSIDs.

I can see the EX3700 on my main network and its IP address is pingable, but the configuration server does not seem to be accessible via that IP address, and SSH doesn't seem to work either. Can anyone explain how I can access the EX3700 configuration without resetting it to the factory defaults?

Thanks!

/afb