1. A wire bunching device, comprising:a base; and
a top cap connected with the base to form a hollow structure running through the wire bunching device in a first direction; wherein
the hollow structure is used for a wire material to pass through,
an inner wall of the hollow structure at least comprises a first portion formed by the top cap and a second portion formed by the base,
the first portion and the second portion are respectively disposed to extend from one end of the hollow structure to the other end in the first direction,
wherein the base is provided thereon with an engagement structure, and the engagement structure is configured to match connection with a connection structure of a backplane, and
wherein the engagement structure is a groove, and the groove is provided in at least one of an outer side wall of the base and a side of the base away from the top cap.