A while back like 2008 I decided to change head gasket on my 1995 Camaro Z28 LT1 but I found it much harder than it looked. It has been sitting in the garage all this time wasting space so I started putting it back and is all done except one issue. I have the Optispark connector from the harness but don't know where it connects to. The Shobox reference guide shows it is connected to a piece which I have circled in the attachment. Do I have to buy this piece or it is a part of some wiring which I cannot find. I will very much appreciate your help in solving this issue. Thanks