Hangar 9 Taylorcraft 20cc ARF Assembly Manual page 26

Step 7
Use a 3mm hex wrench to reinstall the carburetor
isolator block.
Step 8
Attach the ground lead from the ignition unit to the top
of the engine case with the 3mm x 10mm socket head
cap screw and washer provided with the engine.
Tighten with a 3mm hex wrench.
26
Step 9
Feed the ignition battery lead through the hole in the
lower firewall. It will get connected at a later time.
Step 10
Connect the signal lead from the igntion unit to the
lead from the engine.
Step 11
Route the spark plug lead from the ignition unit over
the lower right standoff behind the engine and connect
the cap to the spark plug.The cap requires a firm push
to make complete connection.
Step 12
Use cable ties as necessary to bundle the leads and
arrange them neatly in the engine compartment.
Hangar 9 Taylorcraft 20cc Assembly Manual