Towing hitch Keyless

Hello I have an XC90Phev with double exhaust and want to retrofit a trailer coupling My dealer says that I have to do without the footing because there is no room for the sensor. Does any of you know a solution/manufacturer? Has anyone already retrofitted this? In the operation of vehicles with “protective plate” the sensor sits behind the left wheel box. However, there is no room for my vehicle. Is the original another sensor installed? Thanks for your help as quickly as possible because car is already disassembled ;-))