15ft XLR cables
RCA(m)>XLR(f) adapter
1/4" (m)>XLR(f) adapter
If your deck doesn't have a sufficiently low line-level input, you'll need 2x XLR attenuators, which can be built into those adapter cables or added separately. If you're using the 70D's analog mini plug input (I don't know that deck that well) then you'll need a stereo mini plug (m)>2xXLR(f) adapter with attenuators built in. Mine are Naiant w/ -20dB attenuators, which I use with the R-26
You can buy all of that stuff from Ted Gakidis, Darktrain, or Naiant I believe. Naiant may be the only one who does attenuators (not sure).