Ended up taking the insulation off the brass and it definitely got hot, the silicone dielectric grease I coated the connector and the pins with to prevent water intrusion/corrosion melted out of the connector and burned up/turned black. According to 3M's data sheet, that silicone paste is rated for use up to 400 degrees F so it's pretty surprising that that brass part got hot enough to burn up the silicone paste. I'm not so sure that's good.
I wonder how hot it would get if I plugged it in with the coolant still at 200 degrees like a lot of people do!
