Did I make a cable mistake?

I recently bought a Mark Levinson 515 TT and a 585.5 Integrated amp. The amp replaced an ML 335 because I wanted the phono stage for the new TT. However, due to the placement of the TT it required a 3m interconnect, I bought a set of PH5 Phono Cables from Morrow Audio and they seem to be performing well, but I recently read that the cable from the TT to the phono stage should be as short as possible. So I'm second guessing my decision to have the TT so far from the amp. Moving it within a meter would be a challenge, but not impossible. It would also involve re-cabling part of my HT as the 585.5 handles the front L&R. I have a Ortofon 2M Bronze cart for the time being, but I don't want to be restricted to only MM carts, there is probably an MC cart in this TT's future.

Thoughts & comments?