PWrap will read the pconfig.src settings when it is played with PHost, but you are not that lucky
Center X/Y should stay the default 2000
and the Side/Diameter should be 2015 to cater for the 15LY border. It will automatically add the same amount to the other side of the border. I suggest you make a cross border jump early in the game before it is crowded to test that your settings are 100%.