|All the Bits and Pieces|
First up, I broke off 15 header pins instead of 16 and soldered them into openings 1-15, leaving opening 16 empty; this is labeled "K" on my LCD. According to the tutorial at Adafruit, this is the backlight ground connection. I then cut a length of wire, stripped one end and soldered it through opening 16.
|Backpack with Pins and Wire Soldered|
I "folded" over the wire end and soldered it to the pad on the LCD. This required a little bit of finagling with my third hand's alligator clips, but wasn't too rough.
|Backlight Ground Wire Soldered to LCD|
I swapped two 3-pin terminal blocks for the 2-pin and 3-pin terminal block that came with the LCD backpack
I soldered the resulting 6-pin terminal block to the backpack with the extra pin overhanging the PCB on the side.
|Terminal Block Soldered in Place|
Next up was trimming the wire to fit the length of the backpack PCB and soldering it to the extra pin. This proved to be a bit of a pain, and I ended up with the LCD in a panavise, the backpack held by the third hands, a soldering iron in one hand, and needlenose pliers in the other. I'm sure there's an easier approach...
|Backlight Ground Wire Soldered to Backpack|
|Finished Backpack in Place|