Which connectors are you guys using to plug into each fan? I bought the dorman ones that are supposed to plug into each fan. They plug in nicely, but they don't make a solid connection. When you let go of the connector it isn't seated far enough and doesn't make a solid connection. Plus they never really "click" in. I'm wondering if there is another connector or if I should just crimp on a spade connector. I'm looking for a