Adnā al-ḥalq is the part of the throat nearest the mouth. It produces غ and خ. They occupy a related region but have different acoustic properties.
غ: a voiced, resonant back-throat consonant, as in غَفُور.
خ: a frictional, largely voiceless consonant, as in خَلَقَ.
Do not shift these sounds to the front of the tongue, or replace ghayn with kha. Their audible distinction must remain clear in recitation.