With the following lines in XAB.conf we got 7 connections.
addnode=150.140.159.245
addnode=23.97.137.245
addnode=40.68.113.24
addnode=76.105.204.52
addnode=79.117.17.138
addnode=79.117.6.105
addnode=85.11.137.70
addnode=89.78.174.161
addnode=94.26.96.207
addnode=82.134.214.92

Once you have created the XAB.conf file and added the nodes please wait a few minutes and the wallet will find without any problems the nodes and will start syncing.