[brycen66]

Is that a breaker or a switch in the bottom left corner? Also what gauge of wire are you using?

The idea is safe as long as you are using properly sized wire. Three victors should pull less than 30 amps continuously, although they may spike higher. So for that setup I would use 14 gauge for downstream (12 in enclosed spaces) and probably 8 gauge for up stream (6 in enclosed spaces). And a properly sized breaker (80-100 amps)

It looks like you may be using 12-14 gauge for the whole thing, that's probably not big enough.
That being said I have powered three motors off of 12 gauge before in a pinch, and have destroyed wires. But if you are only running it for a short time, don't mind smoke, and have a fire extinguisher nearby, you can probably get away with this setup and it probably wont do anything too bad. But I wouldn't recommend it.