It sounds like you are needing a replacement tail light for the left rear of your 2017 K-Z Connect travel trailer. If this is correct it would appear the LED Trailer Tail Light w/ Reflector and Bracket # 328-003-85L is the correct light for this model family of campers. Do be sure to check and compare this with your current lights as they may have been different for your specific model number or could have been changed out due to supply issues. We do also have the Passenger Side # 328-003-85... view full answer...
Those are indeed the dimensions of the Lippert Replacement Pitch Arm Assembly, part # LC67VR. The Lippert part number for this item is 675364, so this is the exact replacement you're needing. view full answer...