Photo 1 is of the bottom of the smoke tank vent tube. See the previous page (same date) for the rest of the vent tube.
Photo 2 shows the metal guard I put around the master switch. With the (yellow) smoke switch nearby I did not want to accidentally turn off the master switch when in flight, so I put the metal guard to make accidental operation of the master less likely.
First, a photo of the bottom of the smoke tank vent tube.