I have configured a site to site VPN setup.
1. Head office - spoke
2.Datacenter - HUB
3. Branch office - spoke
Head office WAN link 10.131.61.228 switch - DHCP subnets: 10.10.107.0/24, 192.168.1.0/24, 192.168.129.0/24
switch - LAN IP 10.131.20.214 GW - 10.131.20.1
Data center MX 192.168.128.0 VPN settings 10.131.20.0/24
Branch office VPN settings 10.10.109.0/24
Please find my screenshot and confirm the configuration is right?