2 speed wiper motor and a 3 speed switch plug??

I bought a used dash harness for my car as mine was hacked up. I am just now checking the wipers and I am finding that my 72 2 speed switch will not plug into the harness but I do have a 3 speed switch that will fit the harness connector plug? It is 3488764 and has a rectangular small box off on one side. So my problem is, if I want to hook up the correct 2 speed switch which I believe is 3488781 and I find the correct connector plug, will it be an issue?