I just got my replacement VorTech MP40w backup battery cables in the mail from EcoTech Marine. It appears they used too small of a gauge cable and the original cables were heating up, possibly even a fire hazard. The new replacement cables have an in-line fuse (pictured below) and probably are made with a little bit bigger cable or better quality. You can purchase them directly from EcoTech for around $2 or go through the recall process.
I had a little trouble getting my two cables replaced (More here…) but in the long run, EcoTech Marine helped me out. Thanks Jeff Merten!