That will work in the FCB1010.  One 'Factor XMT & CLK Out to the FCB 1010's MIDI In.  Set the Config page of the Behringer's Global Configuration menu to MERGE.  MIDI Out to the next 'Factor MIDI In.  MIDI Out of that 'Factor to the MIDI In of the third 'Factor.  The 2nd and 3rd 'Factors require their OUTPUT set to THRU.

Obviously, the "master" 'Factor pedal will not be affected by the FCB 1010's MIDI commands, unless you loop #3 MIDI OUT back to #1 MIDI IN, and take great care in setting up all of your MIDI channels and such (to avoid "MIDI feedback").