sending tracks and click with band helper

[cheny]

I run Band Helper on an ipad.
It has a set list and changes sounds on my new modx m7.
I want to run backing track through the ipad and click.
THE PROBLEM:
modx has only main L+R outputs.
how can i run a click and keep a stere signal?

(been thinking of a simple drum machine but most of the m don't have midi in with program change or don't have a song/setlist memory)

Please share your thoughts with me.