Too much power flows thru that switch and the plug will eventualy melt. Due to a previous mishap with mine someone had just soldered the wires to the pins. Good for flowing the power but no good for future disassembly/maintainance.
I found that one side of a spade terminal pushes snugly right on to the pin so I just fitted the wires up with insulated termials.
Still too much power going thru the switch tho so I installed relays for the lights, now the switch only has to provide a small current to engage the relay.