Reporting question for Speaker - Eminence® Patriot, 10", Ragin Cajun, 75W

Product:
Speaker - Eminence® Patriot, 10", Ragin Cajun, 75W

Question:
Hello, I own a Fender Blues Deluxe Reissue amp with a power output of 40W into 8 ohms or 4 ohms at 5% THD; it is connected to one 12 inch 8 ohm Fender speaker.I have two extra "Ragin Cajun"10 inch 8 ohm speakers (not being used) rated at 75 watts each which I am considering installing instead of the existing 12 inch. Modifying the enclosure to accept the two 10 inchers is not a problem. My question is: What`s the proper way to connect (wire) these speakers (if feasable) to the amp. This amp also has an External Speaker output jack. Thank you. Boris