Abstract: An electrical connector for connecting a spark plug cable to the high voltage output terminal of a distributorless ignition system. The connector has a tower member having a cup-shaped electrode which electrically connects the spark plug cable's electrical terminal with the high voltage output terminal of the distributorless ignition system. An insulator boot encloses the end of the spark plug cable and engages the tower member to form a watertight seal. A retainer, circumscribing a portion of the insulator boot, has a pair of latches which engage a radial flange provided on the tower member to lock the insulator boot to the tower member to maintain the watertight seal and hold the spark plug's electrical terminal securely in the tower member's cup-shaped electrode. A lock tab provided on the retainer engages a notch provided in the insulator boot to lock these two components together.