Caterpillar p/n 8N1534 20 Pin Plug As.Bulkhead Connector  - New 

PD   16-18 AWG size

Heavy Duty Aluminum Housing.

Caterpillar p/n 8N1534

Caterpillar list $169.47

This listing is for 1 connector

pic F:Bison Parts, 2013 12 06 16-19 48pc