Usage:
   AiTemplatePlugIn.SetAlwaysTargetSoldier boolean

Argument values:

Used in object types (and how often in each type): Unit (1%)

Used in a total of 3 .con files: Objects.con

Parent directories of these .con files: objects/Vehicles, objects/Stationary_Weapons

Example: (from objects/Stationary_Weapons/Stationary_Browning/Ai/Objects.con)
   rem *** Plugins ***
   AiTemplatePlugIn.Create Unit Stationary_BrowningUnit
   AiTemplatePlugIn.EquipmentType 4
   AiTemplatePlugIn.SetStrategicStrength 0 0
   AiTemplatePlugIn.SetStrategicStrength 1 1
   AiTemplatePlugIn.SetUseNoPathfindingToGetToObject 1
   AiTemplatePlugIn.SetHasExposedSoldier 1
   AiTemplatePlugIn.SetAlwaysTargetSoldier 1

Go to the AiTemplatePlugIn properties list page, AiTemplatePlugIn page, All Properties list, or Main scripting page.