i think the best place is the top left corner, and plumb it to the breather 15mm the right side of the engine. that way you dont have to touch your carbon canister.
most people plumb it to the breather as it stops the intercooler getting oilie and better cooling.
get the cusco s15 specific if you can that has the 15mm fitting. open to atmosphere and block of the pipe going to the turbo intake. :thumbs:
universal Cusco catch can, can be gotten much cheapper but with out the bracket. if you want to go this route i would remove the carbon canister can(should be a guide in the useful section) and mount the catch can there just make sure its the 15mm fitting one :thumbs: