Dual pressure cut-out for fridge (re)install

[SailingTerrapin]

Hi all,

So, the previous owner of my boat left me a new fridge compressor, but didn't hook up any of the lines. I consider myself to be moderately handy, so I figure I'll give it a shot. My only question is where to tie in the dual pressure cutout switch (picture attached). I was thinking this must tie in with a reducing T junction to the supply and return lines for high and low pressure, respectively. Anybody have any experience with this? Thanks -- Phil