I'm sure there may be a better way but how about putting wire in the mold bfore the material. Something like pooring a lead diamand jig. I use what they call a cc form do-it molds. I would try bending the wire to were it needs go and maybe add swivels or bead chain going to the hooks. 1/16 stainless.
Jigman may have some good imput here.
Looks hard to drill into that stuff
