This is how I successfully set them up:-

Connect them to a network and use Winbox to set them up initially.

This page was helpful –

https://help.mikrotik.com/docs/display/ROS/Fail-over+PtP+GUI+example

I found the most success by going into “Quick Set” and > Reset configuration

When it comes back on-line select Clear configuration and follow these steps to set them up:-

Add new bridge.

  1. Open Bridge sub-menu;
  2. Press on “+” to add new bridge;
  3. Apply your changes.

Later in the instructions it requires to assign bridge members to it. This will allow to pass traffic from Ethernet to W60G interface without routing.

Set up 60Ghz wireless connection.

Configure bridge device (RbwAPG-60ad-SA) as follows:

  1. Open Interface menu;
  2. Double click on wlan60-1 interface;
  3. Press on Wireless sub-menu and set mode to bridge (or ap-bridge for PtmP);
  4. Set SSID and password and region;
  5. Select previously created bridge under “Put Stations In Bridge”;
  6. Apply your changes;
  7. Press enable to start transmitting.

Configure station device (RbwAPG-60ad) as follows:

  1. Open Interface menu;
  2. Double click on wlan60-1 interface;
  3. Press on Wireless sub-menu and set mode to station bridge;
  4. Set SSID and password;
  5. Apply your changes;
  6. Press enable to start transmitting.

I also went into IP > DHCP Client and added the bridgeLocal interface

(It seems that without that, devices connected to the Slave devices did not get an IP address.)