What happened at the end of the uri ceremony in things fall apart?

After the wine is paid, the elders of the two families sit in a circle together, with each side completing a half-moon of the circle. The bride, bride's mother and other women emerge and shake hands with all. The father of the bride presents kola nuts to the in-laws and breaks them giving a short speech, before the kola is eaten, and the palm-wine begins to be drunk.