Looking at the specs of a sister cabinet in this range the SK15MAJ it states that the interior and exterior of the cabinet are stainless steel. This is really bad stuff to drill through and unless you can see both sides of the metal you are drilling into I would steer well clear. The only other safe areas on refrig equipment tend to be door fronts or control panel areas where you can gain access to both sides. The other aspect is that these cabinets look very expensive and if you make the mistake it will backfire on you not your boss: he told me to do it can easily be denied. A solution would be to design something that can hook over the cabinet and be glued rather than drilled to to be secured. Speaking as someone who has hit buried refrigeration pipes it is not a nice experience even when you know all the risks and have previously warned the customer. If in doubt please dont pick up the drill. You can always say you dont do DIY. Hope this helps.
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