the LCD sample pictured was anodized in the 1:3 bath as described in the LCD instructions. The 2 others were anodized in the 1:1 bath, as described above.
The wire was bought at Home Depot, it's standard aluminum electrical wire, I forget what gage. (10-3, perhaps?)
The electrical connection on the test pieces is to place the wire through a small 1/8" hole in the part and tighten it thoroughly with a pair of pliers, nearly to to the point of breaking the wire (which happens sometimes.
) The connections are quite tight, even though they are not threaded connections.