First picture was from a Series 3 manual, with 3 wires connected to the coil. This picture is my car with just one positive low tension connection and the other connectors vacant. Does it earth through the holding clamp or should it have a wire connection to negative on distributor?

Having problems getting a spark. LT contact on coil is live but that is the only attached contact other than the HT lead. This is a picture from a Series 111 manual, what are the other 2 connectors in this picture doing and do I need them?