Wire the black wire to the positive side of the two series supercaps, the red wire to the negative side. Note the supercaps are joined in the middle positive to negative, just like batteries in a battery holder. Mine don't look like what you'd build as I use Keystone battery clips and mount them right on the top so it has a battery form-factor.
Come to think about it, you could probably do that with the cheap battery cables, just remove the plastic cover over the contact assembly. I may try that, the Keystone clips are about a buck each!
