Id suggest replacing a chapter instead of adding. Yellow scrip collectables spawn every 2 hours and if you squeeze something in between youre risking to mess up GP (or cordial cooldown if you use them). So for example for Azim Cotton just remove scrip chapters at 0ET and 12ET and put Azim Cotton there. Same for any other mat.
But: If you dont spend any GP on Azim Cotton then yes you can safely add it to yellow scrip scenario. Though you will get only 5-6 bolls per node. Choose whats best for you depending on your needs.