The boxcar is required between the locomotive and tank cars on an oil train like this one. I'm guessing this is the tail of the train since there is only one locomotive (DPU).
Are you sure about the "smiley face"? Jupiter is currently a morning object and Venus is an evening object. Jupiter and Saturn are close together but not Jupiter and Venus.
Here is an inexpensive option. Trigger has a button that you can use to fire up to four flashes. Trigger does not have to be mounted on hot shoe to work.