2019 Sport backup "sonar"?

I'm feeling dumb. Finally replacing the rear plastic crap with a steel Apogee Offroad bumper. I got the one with all rear sensors, so they put the holes in it, etc.

But now that I have my original bumper & receiver off, I'm stumped as to where the actual sensors are in the old bumper! I thought it would be little round plastic thingies but my bumper is smooth all the way. So then I thought it would be behind the plastic and the waves go through and work the same, but I can't find them at all.

Does the TRD Sport not have backup sensors? It *does* have the BSM sensors...I think...but now I can't find those either. I never really thought about it. When I back up the camera comes on but I don't recall hearing any "beeping" or anything like that.

Can someone post a picture of their 2019 rear bumper and show me the sensors please?

 

send a pic of your bumper caps

 

A bit more googling and it seems that perhaps those sensors are only in the "technology package" so I'm assuming I don't have that. Wonder if I can add it afterwards? Hmmm...

 

:-(

 

The 2021 AC Sport out front of my place has "Parking assist" as part of the Technology package. That is a "sound wave (SONAR)" based system with sensors in the rear bumper. Two each "center", and two each "corner".

Round buttons about 30mm diameter from the outside.

 

I have the technology package. It's on each corner of the bumper.

 

So, I'm stupid and bought a bumper with the sensor holes, I thought I even had BSM but guess not. Anyone have a source for little black plastic buttons I could use to pop in them so I don't drive around with little holes in my new bumper by chance?

 

Holes in your rear bumper makes you race ready!

 

Well, it does keep the weight down..

 

With the weight savings of those holes you can put on full skids without penalty!

 

I know this because I just went down this road. The blind spot monitor is attached to the rear bumper side stay, which is located behind the rear bumper extension (the corner part we see).