What’s the sticker in DC power connector kit

In the DC power connector kit like N000000L123A used for the PMP 450M, there’s a metallic sticker in addition to the molex pins and connector. What’s it to be used for? Grounding? Cable management? I can’t find anything in the wiring documentation (https://cambiumdiscoursestack-storageuploadbucket27f6648b-1o0m2g33yqnjr.s3.dualstack.us-east-1.amazonaws.com/original/3X/7/3/73afb8963ef19a347826fda732f5ea39ab023d36.pdf) and I’m assuming it’s completely non-essential.