You must locate any refrigerant lines in the wallse prior to drilling. Typically, for an upright, the condenser coils are in the back, but not always. Some have them in the exterior walls. You know where the evaporator coils are (in the shelves), so those are easily avoided. Look to see if the condenser coils (sometimes just finned tubing) is mounted on the back of the freezer. It willl be large, so you can't miss it. If you don't see it, then it's likely hidden in the walls like my chest freezer. I have an upright like yours. I use it for storing my bottled lagers and hops. I run it at near freezing most ot the time. I did recently discover that you can fit a keg on the shelves if you lay it on its side and position it at an angle from front to back. I did remove the door panel on mine to provide more clearance, so if yoiur still has the door panel in place, this may not work. So, I can lager kegs in it or for cold conditioning any beer. The coils in the shelves are a PIA, but you can work around it. I got my freezer for nothing, so I can put up with a little hassle I guess.