wiring on hotpoint first edition tumble dryer?

i need to know where 3 wires on my hotpoint tumble dryer go the model no is first edition tl 51p the wires connect to the main electrical feed from the plug, the wires are brown-white,
blue and the final one is thinner and its colour is blue-grey i know they all connect to either the positive feed or the negative feed is there any body out there that can help.