If you're using the OpsiveBridge script without changes then it should work automatically. The following code in that script is as follows:
#if EMERALD_LBD
// !!!Thanks to Mattis for providing this code for location based damage!!!
if (hitCollider.GetComponent<LocationBasedDamageArea>())
{
hitCollider.GetComponent<LocationBasedDamageArea>().DamageArea((int)amount, EmeraldAISystem.TargetType.Player, attacker.transform);
}
else
#endif
So, as long as the code at the top . . .
#define EMERALD_LBD
Is uncommented, then it should work.