A system includes a pair of terminal leads joined together. An insulative sleeve is wrapped around the pair of terminal leads. Lacing binds around the insulative sleeve. Cured epoxy can encase the insulative sleeve and lacing. The insulative sleeve can include fiberglass. The insulative sleeve can be wrapped more than 360° around the pair of terminal leads so that a first edge of the insulative sleeve is tucked under a second edge of the insulative sleeve.