Phone Cables for SME 3009

I recently purchased a classic SME 3009 II Improved tone and a Thorens TD 124 turntable. Unfortnuately, the cables are not long enough to reach my preamp from where the turntable has to sit. I need to extend the phono cables and ground about 2 meters.

Should I simply buy a set of extension phone cables (female to male) and a long wire for the ground and hook these up to the preamp? Is there a better way?

Thank you.
- Greg