How to determine the home of the FA Cup?

First, draw lots to determine the home of one of the two teams as the venue for the two sides to play. If one side wins this time, the winning team will enter the next round. If the two sides draw, the second game will be played at the home of the visiting team, and if the two sides draw, extra time will be played. Are you clear? The final is at the non-partisan home. It's a showdown