A wasted spark loom? Seems very odd instructions you have. If its Weber,

Triggers from the ECU to the ign amps are pin 25(std one) and pin 26

Coil pack has 3 wires, 2 outers are triggers from the two ign amps, the centre is an ign fed live, same as the ign amps.

pin 24 is the ign amp clean ground.

Tacho output if it has a driver in the ECU is usually pin 21