1. An implantable device system, comprising of: a first electrical subsystem that interfaces with tissue; a second electrical subsystem; a connector that connects the first electrical subsystem to the second electrical subsystem; and a guide tube that operates in the following modes: active mode: wherein the guide tube is rigid in the axial direction and facilitates insertion of the first electrical subsystem into tissue; and inactive mode: wherein the guide tube allows the first electrical subsystem to move freely with the tissue; wherein, during the transition of the guide tube between active mode and inactive mode, the connector connects the first electrical subsystem to the second electrical subsystem.