Need some help with turning on my water heater

[AJFishin]

I have an older unit, maybe 2003: Suburban SW6D Direct Vent Gas Water Heater, Model 61.
Problem is I can not find anything online on how this unit works and the manual is a little vague on the operating instructions, see below.

When I searched my unit, it brings up newer units and nothing looks like mine nor do they operate like mine.

Mine says "do not light the pilot since it's a self lighting unit".

Step "6" says, "turn on electrical power to the appliance".
I'm getting confused on this part and I'm assuming "appliance" is either the water heater unit itself OR a stove or fridge?
But I don't see what turning on the stove or fridge has to do with turning on the water heater if this is what they're referring to?

Second, the water heater, that I can see, does not have any switch that says ON/OFF or one that looks like what is pictured in the manual. The only switches I see near the water heater are for the Porch Light, Steps, Cargo Light and then there's one switch in the bathroom that says, "Holding Tank Heater".

I hope someone has some insight on what I need to do to get this up and running since I'm confused here.

Here are some pictures: