The DDCS V4.1 comes with four holes in side to mount it into the panel.  I just needed a box to hang off the side of my mill while putting the rest of electronics under the mill. There is a drawing provided if you need to modify it. 

Parts Needed

Qty 4 Heat-Set Inserts for Plastic, Brass, M4 x 0.7 mm, 6.4 mm McMaster 94459A160

Qty 2  Shoulder Bolt or Pan Head   M2.5x.45mm Length 10mm For USB on side of box

Qty 4  Sholder Bolt or Pan Head M4x.07 Length ~15mm

¼-20 Threaded rod and nuts to create post to mount