If you go to the ARP site, there are pictures how they suggest mounting the fans, which you can purchase on Amazon separately if you don’t want to install an ARP device. I have the ARP device and it has made a huge difference. The fridge is working great, and I haven’t needed to replace the cooling unit since the second one was installed in 2015, and with the two extra fans, the temps in the fridge and freezer are very good. It’s 100 degrees outside here as I type this, and the freezer is at 13 degrees and the fridge is 40, which works for us.
www.arprv.com