replaced my 18hp briggs and stratton with a 18hp Vanguard engine. everything matched up but the starter. old engine had a piggyback solenoid new one will have a stand alone. everything is hooked up but not getting starter to engage. able to jump it and get the starter to turn. the old starter had two wires on the bottom and one wire hooked to the side using a paddle connection. do I need to run a wire direct from the key to the new solenoid,