Clan wars Clan Castles

I understand that the defensive clan wars base does not change the troops in the clan castle, but does anyone know if the clan castle you attack with is from your normal base or your clan wars base? Can you have different troops donated to you to help with your two different attacks?

The war base clan castle is used for defense only and it automatically replenishes itself with the original donations, so donation only occurs once. The clan castle in your normal village is used on offense.