On the cPanel server:
/scripts/pkgacct acctname
On the iWorx server:
scp cpanel.ip.address:/home/cpmove-*.tar.gz /home/
/usr/local/interworx/bin/import.pex --control-panel cpanel --ipv4 target.ip.address --archive /home/cpmove-acctname.tar.gz | tee -a /home/acctname.import.log