How to know if baby is at exact position na prior sa sched ng ultrasound?

Hi mommies, just wanna ask if paano po malalaman kung nasa exact position na yung baby? Next week pa kasi sched ng pelvic ultrasound ko and I am excited na to know the position of the baby, and at the same time kinakabahan na kasi goal ko talaga is normal delivery. Malalaman po ba yan thru baby’s movement or kung saan banda may matigas na part sa tummy? 36 weeks and 2 days na po ako today. Thank you so much. 😘