Question about expression pedal set up.

Greetings,

I am setting up a new system. I have a Win 10 PC and a Roland 700NX keyboard which has three pedals none of which are expression pedals. I have a Roland EV-5 expression pedal which has a large jack.

I would like to be able to plug in the expression so as when required, it would control expression on my keyboard. I would like to do this without taking out the three piano pedals but there are only three outputs on the keyboard.

Is it possible to do this, so that it works in Cubase and in standalone VSTs? Perhaps via some adapter?

thank you

Z