RCA vs Phono cable


I have a 30+ year old Pioneer PL-560 turntable in perfect working condition (Shure M97XE cartridge/stylus) My Primare preamp has no TT connections so I just bought the Graham Slee Gram Amp2 SE phono stage with a PSU1 (should arrive Thursday). I will need a pair of interconnects to connect the phono stage to the preamp so I bought a used pair of Synergistic Research Level 1 UEF Atmosphere (RCA) 5ft/1.5m Interconnect cables. Then I saw info on "phono cables." Is there a difference? If yes, what? Should I have bought a phono cable instead of an RCA or a shorter RCA ?
mewsickbuff
A Phono cable is generally referring to the cable that will connect the turntable to the phonostage.  Often times a turntable will have a hardwired cable, in which case you do not need (and cannot even use) a detachable Phono cable.
My turntable has a hardwired (L & R) cable with ground wire to attach to the Graham Slee’s input. But the "output" cable from the Graham Slee to the preamp is the one I’m asking about. So I'm assuming the "Synergistic Research RCA.interconnect" I bought is okay.

A phono cable has the so called Din 5 connector on the arm side

and RCA (or XLR) connectors for the amp. connection.