I am using the flexmod P3 which does not have differential modulation inputs. Should R-, G-, and B- be connected to the flexmods' ground (and therefor connected to each other) or is it sufficient to not connect these signals and instead only connect ILDA ground pin 25 to the flexmods' ground? If R-, G-, and B- are connected to flexmod ground, should ILDA ground pin 25 also be connected to flexmod ground?