2 PA-7s via CA-7 to Polk SDA-SRSs original

Good afternoon!
I am looking to run 2 Nakamichi PA-7s to original Polk SDA-SRSs (4 ohm), about 2 meters, and use a Nakamichi CA-7 for the crossover. I have not used the 2 PA-7s together. Any thought for speaker cables? I have not had to buy any for awhile and am out of the know. Thank you!