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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, how many wires are there to be connected; 2 or 4? Better yet, please post back clear pictures of the wires. Determine which wire(s) is tied to the AC plug/power cord and which wire(s) goes to the power supply board.
The best approach would be to determine which are paired when switched on. Use the continuity function of a multi-meter to find out which 2 terminals of the 4-pin switch shows 0Ω when switched on.
Please post back results / observations of the above once tried.