It's best to use shotgun style bi-wire, or two stereo pairs of speaker cables to make the SRs sing. The Data Link does not sound as clean vs. going bi-wire, and the Link should be used temporarily. I have never tried using a jumper in place of the Data Link, since you will have to look for a 30-36 inch length, you minus well by another pair of speaker cable and do it that way. At least that's what I did. As mentioned above, you can experiment with different brands/models of speaker cables to see which fits best on the top module or the bottom module, or you can keep the two the same type. Lot's of possibility to fine tune the sound. Just make sure you get a good size gauge and a good sounding cable, cause that's what the SRs will transmit, whatever it is fed....truly neutral/transparent speaker.
Good luck.
Good luck.