Survey Monkey Integration / Custom Objects / "Eloqua Contact ID"

Hello,

Got a fun one for all yall out there. Survey Monkey Integration with Eloqua!

The company I work for had Survey Monkey integrated and everything was rainbows and sunshine. Well, the previous automation specialist unlinked Eloqua and SurveyMonkey in my instance. I have since been able to re-link (which was a pain) but my main question is how do I get the "Eloqua Contact ID" to match the unique user number that SurveyMonkey kicks out.

It's this field;

And it's supposed to be a number like: "CTITM000000001111"

And the last four numbers of THAT number are supposed to match what SurveyMonkey has located here;