Retrofit fog lights – Help! Double relays?

Hello I know that there are several contributions regarding retrofitting of fog lights, but no real solution was found for the following problem: in my V40 year 1998 there were already cables, so I only had to install the NSW. My problem comes when installing the double NSW relay (see appendix) Behind the instrument cluster I find only one plug, and indeed the one from the fog lamp, but where is the second plug from the fog lights from the front??? could not find one even after a long search.. do I have to install the double relay at all? does it only need the fog lock relay, a new switch and a software release? According to the friendly I should simply get a new switch and install the double relay without the need for unlocking.. but as I said. no second plug for the double relay behind the combi instrument.. Help!! lg