Now we may object: If so, this would imply that the lower realms have ten roots – these being the ten last parts of all ten Sefirot – not just one root in the overall Malchut. The answer is that the law that the lower creatures should exist is called Malchut (the overall Malchut). This is a bond of all the powers contained in the ten Sefirot to bring forth the lower realms. For each Sefirah contains a power that relates to bringing forth the lower realms and beings, and this is its individual Malchut (such as Malchut of Chessed, Malchut of Gevurah, etc.). The overall Malchut is the law that the lower realms should exist. And from what is this law or light constructed? It consists of the totality of the powers existing in each of the individual Sefirot to bring forth the lower realms.
How the Lower Realms Root in the Sefirot
Kalach Pitchei Chokhmah 26:10