Ajjhata means internal and bahida is external.
Meaning, through seeing rupa, vedana, sanna, sankhara and vinnana through kaya, vedana, chitta and dhamma, once can see how the internal rupa and 4 kandas become upadana or holding on and comparing it with external.
This is where, we get into desire to possess more when it matches and reject those which do not match our internal khandas.