A method for forming an implantable medical connector stack comprises providing a first dielectric seal element； positioning a conductive ring contact element into engagement with the first dielectric seal element； positioning a canted coil spring inside the conductive ring contact element； placing a second dielectric seal element into engagement with the first conductive ring contact element； characterized in that the conductive ring contact element comprises a closed side comprising a side wall and an opened side； and wherein the canted coil spring is positioned inside the conductive ring contact element through the opened side before the conductive ring contact element is engaged with the second dielectric seal element to form a ring groove comprising one side wall of a conductive material and one side wall of a non-conductive material formed at least in part by the second dielectric seal element for retaining the canted coil spring.
