Summary
Lab Settings can be accessed via: Administration > Settings and selecting the 'Lab' category.
This page documents each setting.

Idexx Interlink Communication.
These fields are used by MWI/Idexx to configure Idexx Interlink.
HESKA Data Capture Utility (DCU)
As above, these fields are used by MWI/Idexx to configure Idexx Interlink.
Filter by Client Category
Enabled = Allows users to filter Lab Results by Client Category in Utilities > General Lab.
Disabled = Do not allow users to filter Lab Results by Client Category in Utilities > General Lab.