If you need to find out the server and port on which you need to install the tracker, you can find it out after creating the unit or in the unit settings in the unit menu - Settings - Hardware, after you select the desired device type.
Most likely it will be:
Device Type - Queclink GV55W
DNS server Host - 11746.flespi.gw
IP server Host - 126.96.36.199
Port - 32008
However, in some cases, a particular unit may have a slightly different server and port, so please configure the tracker to the server and port specified in the unit settings.