Connect Multiple Subnets using SonicWall Pro Series Devices

Can anyone help. I have the following setup

Head Office - SonicWall Pro 4060 SonicOS Enhanced.  Network 192.168.10.x

Remote Office - SonicWall TZ170 SonicOS Enhanced.  Network 192.168.1.x

Remote Office - SonicWall TZ170 SonicOS Standard.  Network 192.168.101.x

Both Remote Offices have a VPN Connection configured to the Head Office, but not to each other. ( I have more remote users and branch offices so doing a mesh, connecting everyone to everyone is not a realistic option. I picked 3 sites to use as an example)

192.168.1.x can communicate both ways with 192.168.10.x as there is the VPN connection between the two networks (they are a few thousand miles apart geographically)

192.168.101.x can communicate both ways iwth 192.168.10.x as ther is the VPN connection between the two networks (they are a few hundred miles apart geographically)

****Problem****
I can not communicate directly between 192.168.1.x and 192.168.101.x. These two networks do not see each other. They both see, and are seen by, 192.168.10.x.

I have tried creating a static route entry to poing 192.168.101.x to 192.168.1.x but must be doing something wrong as they still do not see each other.

Any help is greatly appreciated.