[Rey_a]

Martin,

I take it you are talking about a MIDI connection ?

If you do, a MIDI Y splitter cable might work. I use one to connect a bass pedal board to both my keyboard and my MobileSheetsPro tablet so I can use the pedals as a MIDI controller to both my keyboard and MobilesheetsPro. (my keyboard does not have MIDI through or MIDI Merge function, so I was forced to look for an alternative . . .).
You will need two MIDI to USB converters (one for each tablet) when trying to use a MIDI Y spliter cable.

Also you do not specifiy what you want to achieve.
If you want to be able to open the same scores / same pages on both tablets, you could also have a look at the "connect devices" feature in MobilesheetsPro which allows you to do just that.



Rudy