Adding motion / tilt sensors to CMA vehicles

[Muss]

Hello. My car ,2019 XC40 D3 MOMENTUM FWD, came without an alarm, without IMS and without BBS. I purchased sh IMS and activated (65- 02interior movement sensor)  with car horn and works . When I wanted to install the BBS (siren with inclination sensor 31652494), I couldn't find the connection plug. At IMS, there was a connection plug in the ceiling light. 
 Where can I find the BBS connection plug or do I have to draw wires? 
 Has anyone encountered this problem? How did you solve it?
 Thank you