For curiousity sake, I called Lectric Limited. They do not have the battery cables we are discussing for the late Z28's (6297684AS or 6297651AV). They also raised question on late Camaros having side post terminals, but that's a different question altogether. The fella on the phone hypothesized that perhaps only cars with HD batterys got the side terminal cables, since the AIM (that he has) didn't have the side post cables listed?
I've also made inquiry with Bowtie Muscle Car Parts, requesting length and PN on their '69 Camaro Z28 sidepost battery cables, but haven't yet heard back on those questions. Meantime, I extracted my cables, stretched them out, measured them and photographed the ends, part numbers, etc.
Positive Cable: printed PN 6297684AS, length ~42" (eye to eye) with a ~19-20" small lead wire.
Negative Cable: printed PN 6297651AV, length ~32" (eye to eye) with a ~8.5" attached smaller wire.