2015 volvo s60

Hello,

My name is Chadwick and I work for an ignition interlock company (Smart Start Inc). We have a vehicle coming in next week and we are trying to get a headstart on the installation. For our system, we need to find the following wires only:

12VDC+ Constant

IGN

Starter - Our unit cuts the starter circuit until the test is positive then internal relays open the circuit. So the starter wire must likely be inline with the starter solenoid.

Headlights, Hazards, or Parking lamps - We can utilize a singular positive or negative signal, also we can build relay or diod packs if necessary

Horn - likely this is negative but we can use a positive signal

Our company hasn't encountered a newer Volvo and any help would be much appreciated!

Thanks in advance!