Thank you very much! I've ordered a breadboard and will try to get it running when I received it

Hi all!

So today I received my Arduino toys from China, together with two Arduino Nanos, two NRF24L01 and an ethernet shield.

Soooo, I've run into a (small) problem. Excuse the silly question, but how do I connect two devices to the same PINs on the Arduino?
Specifically, I want to follow this instruction: http://www.mysensors.org/build/ethernet_gateway
My Arduino has two GND and one 5V and one 3.3V output PIN, so that's no problem -- but how do I connect pins 11, 12, and 13 (MOSI, MISO, SCK) to both the ethernet shield and the radio at the same time?

Is a breadboard neccessary for this?

Many thanks for your help, it's greatly appreciated!