The x-max has the capability to mount a spool internal to the build chamber, in the back lower right panel. I've placed my spool holder in that spot, as it does not interfere with the rest of the build volume. Use internal mounting for nylon and other hygroscopic filaments, to prevent moisture penetration.

As an aside, if you'll be printing ABS and other high temperature filaments, level your bed with the three screws, then set the gap to the nozzle. Preheat the bed to 100 °F and reset the gap, as the bed expands and will otherwise drive the nozzle into the build sheet.