An implantable medical device connector assembly adapted to connect to a medical electrical lead, comprising: a circuit member comprising electrical circuitry; a molded, insulative shell comprising first and second opposing sides extending between first and second ends thereof, a connector bore being defined through one of the first and second ends of the shell to a bore distal end by an inner surface of the shell, and further, a plurality of apertures being defined through at least one of the first and second sides of the shell and disposed along the bore; a stacked subassembly positioned along the connector bore, the stacked subassembly comprising: a first pair of members comprising a first conductive member and a first sealing member positioned together along the connector bore, the first conductive member having a surface exposed through a first aperture of the plurality of apertures; a second pair of members comprising a second conductive member and a second sealing member positioned together along the connector bore, the second conductive member having a surface exposed through a second aperture of the plurality of apertures; a first trace, extending from the circuit member, directly coupled through the first aperture to the first conductive member; and a second trace, extending from the circuit member, directly coupled through the second aperture to the second conductive member; and a mating tool comprising a body from which extends a plurality of prongs each filling a respective one of said apertures from an outer surface of the shell. a circuit member comprising electrical circuitry; a molded, insulative shell comprising first and second opposing sides extending between first and second ends thereof, a connector bore being defined through one of the first and second ends of the shell to a bore distal end by an inner surface of the shell, and further, a plurality of apertures being defined through at least one of the first and second sides of the shell and disposed along the bore; a stacked subassembly positioned along the connector bore, the stacked subassembly comprising: a first pair of members comprising a first conductive member and a first sealing member positioned together along the connector bore, the first conductive member having a surface exposed through a first aperture of the plurality of apertures; a second pair of members comprising a second conductive member and a second sealing member positioned together along the connector bore, the second conductive member having a surface exposed through a second aperture of the plurality of apertures; a first trace, extending from the circuit member, directly coupled through the first aperture to the first conductive member; and a second trace, extending from the circuit member, directly coupled through the second aperture to the second conductive member; and a mating tool comprising a body from which extends a plurality of prongs each filling a respective one of said apertures from an outer surface of the shell. a first pair of members comprising a first conductive member and a first sealing member positioned together along the connector bore, the first conductive member having a surface exposed through a first aperture of the plurality of apertures; a second pair of members comprising a second conductive member and a second sealing member positioned together along the connector bore, the second conductive member having a surface exposed through a second aperture of the plurality of apertures; a first trace, extending from the circuit member, directly coupled through the first aperture to the first conductive member; and a second trace, extending from the circuit member, directly coupled through the second aperture to the second conductive member; and a mating tool comprising a body from which extends a plurality of prongs each filling a respective one of said apertures from an outer surface of the shell.