Abstract: An implantable medical device system including an implantable electronic device having multiple electrical connectors and an associated electrical lead also having a corresponding set of electrical connectors which engage with the connectors on the device. The lead has a connector assembly mounted to its proximal end, including the lead's electrical connectors and a mechanical connector. The device has a connector block with a bore extending therethrough sized to receive the connector assembly of the lead. A pulling tool is provided for pulling the lead connector assembly proximally in the bore of said connector block from a first position in which the lead's connector assembly is not fully inserted in the connector block to a second position in which said connector assembly is fully inserted in the connector block, the pulling tool being provided with a mechanical connector which engages with mechanical connector on the lead's connector assembly.