Connecting Three Soundcraft Si Impact mixers to Stage Box Via MADI

groovethumper

At church we have a Soundcraft stage box and three Soundcraft Si-Impact mixers that we use for a monitor desk, a streaming mix, and FOH. We have MADI cards in all the mixers and the stage box. The Monitor mixer runs off the Aux out from the MADI card on the stage box, and we need to split the signal off the main out of the MADI card on the stage box so we can run it to both the FOH and the streaming mix.

What would we need to split the MADI signal coming from the main out on the stage box?

Sorry if the question seems basic to some, but I'm new to all the MADI stuff.