A connector and lead (or other elongated body) can produce a tactile sensation that indicates alignment between connector contacts of the connector and the terminals on the lead (or other elongated body). For example, a terminal or retention sleeve of the lead (or other elongated body) may include an indented circumferential groove that interacts with a connector contact or retention contact of the connector to produce the tactile sensation. As another example, one or more terminals or spacers may have a larger diameter than adjacent spacers or terminals to interact with a connector contact to produce the tactile sensation.