.. how to wire a 3-pole starter relay ? ..

HELP please ! ..was wondering how to wire a 3-pole starter relay ? ..
i have seen the 4-pole schematics where you wire the (2) spades to neutral safety switch and the start wire from key ... but what do you do if you only have (1) spade ?? .. see pic ..



the relay that is my car only has (1) spade besides the batt'y and starter solenoid terminals ..

thanks in advance for your help ! !