Starter Solenoid Switch for
Chamberlain 6G 9G Tractor
with Perkins L4 4-Cyl diesel engine
with lever type starter
Chamberlain Countryman-6 306 354 C670 C6100 Tractor
with Perkins 6-306 6-354 6-Cyl Diesel Engine
with induction type starter
where fitted 
 
switched input connects to small terminal - lead from battery is connected to the large outer terminal (use spade terminals for battery supply to additional items) - lead to the starter (or other device) is connected to the large inner terminal