The two plugs in your hand plug into two small aluminium boxes about 50x75x20mm.
They are mounted together in a steel bracket that is usually bolted to the body work of the car.
These are the igniters. The send power to the coils ( the parts you described as being joined to the sparkplugs).
One of the plugs has 5 wires.
The 5th wire is a small black one. This is where you get tyour Tacho feed from. You need to set the tacho as a 4 cylinder as it is seeing half the engines sparkplugs only.
Sorry I don't have a photo of the igniters but try this link
http://www.google.com.au/imgres?q=1...w=170&start=0&ndsp=13&ved=1t:429,r:4,s:0,i:81.