How to wire up this air compressor?

i found a small compressor and tank in my garage a while back and want to install it somewhere on my truck for mountain bike tires and emergency use.
I have zero understanding of wiring and power. Would anyone have an idea of what’s needed to get this thing going safely?

 

Looks like it has a pressure switch. You just need a 12v relay that can handle at least 20amps.

 

Alligator clips on the battery, on demand? plus an inline 30 amp fuse? That's the fastest way I can think of. It's 12 volts and 20 amps, same as my Viair...

 

One way..not only way

 

This all looks correct. Keep the fuse close to the battery and use heavy enough wire.