Replacement Fifth Wheel 7-Way Harness for Bed of 2011 Chevy Silverado 3500

I need a harness with the same hole mounting pattern as the previous connector in my truck bed. I have a 2011 Silverado C3500, there previously was a seven way connector installed inside the bed. That wiring adapter harness has been removed and thrown away. I would like to use that existing cutout hole pattern for the new harness connector. The existing bolt hole pattern is 2.5inch wide x 1.75inch tall - similar to the Pollack PK 12-7073. The Pollack harness recommended PK11893-11932 does not list the connector cut-out dimensions. I would really prefer the harness have a 90 degree connection on the bed end similar to the wiring on the Bargman 54701-003. Can you help me find the correct harness which will match up to the connector cutout already in my truck bed. Thank you very much

asked by: Joe J