The Nikkud, which are the Hebrew vowels, are the channels of light form Chokmah to the lower level and they feed the Shechina below.
The 9 vowels are
Kamatz, Patach, Tzerei, Segol, Shva, Cholam, Chirik, Kubutz and Shuruk.
They bring the energy to the letters and give them the power to create.
Cholam is right column, Shuruk is left column and Chirik is central column. The Nikkud carry the light of Chokmah to be revealed in Malchut. The Vav, which is Zeir Anpin, reveals the light of Chassadim as the six channels unite together in the Vav.
The Six channels of light start from the six letters אבגיתץ and they fill up all the 7 levels to Malchut. 42 connections are the letters that represent the force of Creation, the name of 42 letters.