Wiring for a engine stand

How's that different than when people put the ignition switch in run, then jump the starter relay?
I'm not saying he has to, or ought to do it that way, but it should work.
No?
Assuming the start switch can handle the load.
lemme look at an FSM or the VAT40 manual for solenoid draw

edit> Not coming up with an amperage for the solenoid draw, although it does show the switch (I take to mean switch in the relay) to carry 15 amps at 6 Volts. if so, that's what feeds the solenoid.