Manasara 15.87

15.87

pañcaṣaṭ saptāṣṭaṃ vā yathā śaktivaśānnyaset
tasyādho vīrakarṇe tu phalakā bodhikāntaram

Or five, six, seven, or eight, one should place them according to capacity; / below that, on the vīrakarṇa between the abacus and the bracket capital,