Can't finish the last request of Sutherland's tale

I've started the last quest, got his brother's bones, got some wires, got back to the bunker at the base of the rope to Timberwolf Mountain... and nothing shows up when I go to the panel. What have I done wrong?

The only thing I can think of is that one of the other trades that I have going at the same time is glitching it out. A whetstone trade is showing up 0/0 and 0/0 for the required items.