Step 7: Attach Ground Wire to Ground Tabs
2) Attach the bare 22 gauge solid wire to the ground tab of the single output jack first and solder.
3) After soldering the first jack, replace it into its hole and determine where to make bend/attach the wire to the ground tab on the next jack.
4) Solder the next jack, and so on, until all the ground tabs are attached and soldered.
Hint: I like to wrap the wire around the tab and crimp with the needle-nose pliers before soldering.
Note: Do not worry about the bare copper ground wire touching the case, they are meant to be connected together