Going through the same mental debate...
The two access ports on the back or the frunk floor could be opened up easily, then the round plug on the front of the car. So we now have an in and out without any cutting.
Yes, we will need to bring the lines in somewhere.
And on top of that, I also want to have a spare and a normal size frunk. So that will be a challenge without cutting.
I have a 986/996 spare which is very slim. I also have a collapsible spare as another option. Smaller diameter but much wider than the 986/996 wheel.
Then another idea to reduce the size of the spare and give more room would be to get a cheap 4 1/2" Fachs and install a Honda Civic donut. That will reduce width and diameter. Not perfect as a spare but how often do you use it and for how far...
There was someone else who installed a couple of small coolers in the frunk under the front horizontal arched reinforcement. That was a long time ago and I search through all of his post but never saw more pictures.
Then Trekkor has another option where his cooler is laying against the lower back side of the frunk. He did make three holes to vent out in the rack and pinion area.
Very few non cutting options...