Rack sidecar for additional IT equipment and cable management

A structure of a server rack and sidecar comprising:

• a server rack having an opening and a server door on a front side, wherein the server door is adjustable;
• a sidecar mounted to a side of the server rack, the sidecar having an access area on a front side, wherein the server rack opening and the access area are accessible from a common side;
• a triangular shaped adapter mounted to the common side, wherein the adapter does not restrict access to the server rack opening and the access area, the adapter has at least three vertical sides comprising:
• a connecting surface coplanar with the front side of the server rack and the front side of the sidecar;
• a server door surface that extends from an intersection line with the connecting surface to a horizontal distance from the connecting surface, wherein the horizontal distance is greater than zero, and the server door abuts the server door surface at a closed position of the server door;
• and
• a secondary surface that extends from a second intersection line with the connecting surface to the horizontal distance from the connecting surface, wherein the server door surface and the secondary surface have a third intersecting line at the horizontal distance.