fitting type b multifunction display

today i had a go at fitting the multifunction display from a peugeot 307. the display fits no problem plugged straight in and worked first time. problem is that the button on the wiper stalk i popped it off hoping to find the pcb board like i had read but mine doesnt have this its just a blank. will i need to swap out the comms 2000 unit for one with a button ?

thanks in advance