Put a wire onto the big thick live cable/bolt on starter, then arc it onto the other bolt on end of starter with thinner wire on it, will do exactly the same as turning key obviously make sure IGN on, and remember it wil fire up just remove wire sraight away, make sure its in neutral, ideally get someone to sit in with clutch down to be sure as its the first time and you will be right in front of it lol...

WHATEVER you do DO NOT let the wire touch anywhere else, as you will damage your battery by shorting it out...