Between feet you have 44.5cm (17.52") wide and for the height you have 50cm (19.68").
A M200 should fit without problem but not a M300 if i look for specifications.
M200: with spool 345 x 430 x 430mm [13.6 x 17 x 17in]
M300: with spool 490 x 560 x 590mm [19.3 x 22 x 23.2in]
Anyway, Zortrax printers have itheir own enclosure no ?