My node ASL 40446 is connected to my own HB Link server. I use HBlink3 and this is how I did it.
ASL 40446 <-> USRP 1001 <-> Analog Bridge <-> MMDVM Bridge <-> HBlink3
Please note that HB Link Belgium may have a password set up on their HB server. You may need to get this info from them so you can configure your MMDVM Bridge.