I have recently bought this engine and I want to know how the electric start works.I have 2 wires that come out of the engine but there is no key location.Do I have to install a solenoid and key ignition somewhere outside the motor.I looked inside and saw the starter but no solenoid or key or start button location. If I elect not to use electric start can I remove the wires coming out of the engine compartment for the start system?