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Reverse cell protection in parallel 2x18650


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As I understand the 75c has reverse battery protection when using a single cell. The 250c also has reverse battery protection even when using a multi-cell setup because it's series. 

It seems like if I wire a 75c in a parallel setup with 2 cells, and insert one of the batteries the wrong way, it's going to hard short and make the circuit series. 

Is a P channel FET the best way of building reverse battery protection? This thread was quite useful.

These two mosfets look like just the thing I'd need. The specs look about right. I'd really appreciate if someone can chime in.

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