Fire it up, please don't!!!
That last photo tells it all, your compressor is manfactured for single phase 110 volts or single phase 220 volts. Single phase 220 volts is what the rest of the world uses, America uses two 110 volt lines to make 220 volts, or at least that was the way it was 20 years ago.
If you really want to try and do this yourself look inside of the switch box cover, there should be a schematic there telling you how to change the wires for 110v or 220v, that will tell you what the compressor is wired for. Like it has been already suggested you need to check the the outlet box that is marked 220 volts, if it is 220 v there will be 110 v in each spade hole to the ground, many years ago they ran the neutral wire and the ground wire connected, a practice that is illegal.
I highly recommend you contact someone that is qualified to handle this, I've been bit by 220 v here and because it's half the amperage of 110 it kinda tingles, 220 American can kill you, I agree with the other poster, this is a BBQ forum, we need to stick to that, you might try posting your question on a electrical forum just to find out what you have.
Gene