Unable to delete large volumes of old records,

We have over 2000 records to delete within ZAM however there is no
option within the Manager to query the selected 2000 records using the
machine name and delete. Documentation says 'This is a manual process'
however we need to cross reference ZAM to our existing Asset Mgmgt
database. There is a option within the web console to select from a csv
list but the manager does not have this option aswell.

How would you delete selected machine names within the manager?