Festool Carvex Allen Wrench Holder

Using festools Carvex PSC 420 Jig Saw you need to have an Allen wrench to adjust for different size saw blades. While the older model had a place in the base, the newer model hasn't. So I was wondering how to find a place to store the included 2.5mm allen key. The hex key holder can be placed directly underneath the rubber frame that is fixed to the battery back.
In case the allen wrench does not hold perfectly, bent it slightly that it will grip into the holder by itself.