Hi Robin,
I'm doing my '72 Eldo. I got a grommet at the local Tractor Supply to replace the failing one. The wires for the TS & S/T lights route as described at Bender's site. However, the wire hole at the taillight didn't have a grommet (on mine) and the hole is partially covered by the taillight bracket so, I haven't figured out what to do there yet. Also, I'm trying to figure out how to route the battery cable to the starter too.....I should have taken more pics.
Good Luck,
Art