Cruise retrofitted, but problem

Hello to the round, I wanted to upgrade the cruiser today with my 850 switch. Up to the last cable I got through great, because in the net there is an almost perfect, strongly illustrated instruction (don’t know the link). Just almost perfect, because a tiny wire harness is not described there further (Fig. 1). While I was immediately clear from the plug shape, which are the two pedal switch plugs, it is vaguely clear to me that the yellow plug should probably replace the yellow one present at the brake pedal switch. But it is completely unclear to me – even after many hours and exhausting study of the WHB (Fig. 2) – where the large white plug belongs… Can someone help me there? Maybe with a picture? Thank you in advance… Best greetings from the southern north Hessen from the beach of the Fulda, Axel