The ballots are from generally GOP-heavy Green Valley, south of Tucson. It may work out for the positive, and potentially even avoid a recount if McSally manages to net a gain of 68 or more votes
I heard on the James T Harris show that they were from northwest Tucson. This neck of the woods skews Republican, unless you discount all those reusable grocery bag toting leftist that shop at the Whole Foods, Sprouts and Trader Joes.
New ballots increased McSally’s lead to 166 - not enough to avoid a recount, but still an increase