RFM 22b and Arduino pro micro

Hi,

I'm testing communication between two arduino's (uno and pro micro) and two rfm 22 modules.
I've got everything connected properly on the uno, testsketch works.

But I don't know how to hook up the arduino pro micro.
I used these pins:

arduino: rfm22:
16 mosi SDI
10 nsel
14 miso sdo
15 sclk sck
? NIRQ

Where do I need to wire NIRQ to?
And what do I need to change in mij sketch to have this work on the pro micro?

best regards

Ruben