J1 NGK HT Lead, Fittings & Sets Spark Plug Cap NGK J1 Cable Splicer for 7mm HT Cable NGK also knows what a hassle it can be to connect new wires to the stock CDI ignition coil. We&196;&244;re making that a whole lot easier with this new in-line wire connector. Simply insert the lead from the ignition coil unit in one end, the new NGK wire end in the other, screw the two pieces together, & you&196;&244;ve got yourself a watertight finished piece! made from high-impact plastic, this handy unit will solve all wire connection problems.