alright so for anyone without the rear shelf speakers thinking of installing the hansshow provided ones, the cable for those speakers is too short and will not reach the dsp, or you will have to put the dsp under the passenger seat in a way that passenger might be able to kick it and damage it, i was lucky to have a whole shelf from a 2019 with the speakers that ibought of ebay and used those instead and replaced the whole shelf, also another problem with the hansshow speakers is that at least on my 08/2020 model 3 sr+ the grill for the rear speakers was just show and right under the grill was like built in foam not a hole, so even is some how i made the cables long enough to work the speakers themsleves would not be able to be placed there, will update a picture of the under side of the 2020 shelf to show the foam. still putting all the trim back im place and playing with the channel crossings. so beware of thinking youcan install those version E speakers, the shelf on your car might require some cutting and modiffying that i did not want to attempt because it looked like it would not work anyway