The front and rear audio output are connected into one. How to separate?

[BlackJacket]

For starters, I would state that drivers are not a problem because I tried 5-6 versions of realtek drivers from 2015 to 2020. No driver makes a difference. They are all the same and they all give me the DTS Sound Manager and the sound and the headset and the speaker is on the “same line” not separated.
Also, windows is not a problem either.
I just did a system reinstallation. Windows 10 21h1 today installed current version. Everything is default, I didn't touch anything. It didn't help. Then I updated the relatek drivers from the HP site of my PC: version: 6.0.1.8335

By the way, the case of this computer is repackaged. Not the original. But that shouldn't matter? The cable from the front sound jacks is connected where it should be connected. The lower left corner on the motherboard, it says it's for audio.
I bought this computer like this. This has been a problem since the beginning.

The speakers are on at the back.
Headphones forward.
In that case, the sound always goes to the headphones. There’s no way I can make it go to the speakers. Every time I have to unplug the headphones from the front 3.5mm jack to get the sound going to the speakers.
This computer model automatically installs DTS Sound Manager.
It is impossible to start the realtek sound manager because it does not exist.

When I enter Sound / playback it looks like this: 

437cTZv.png (400×455) (imgur.com)
However,
in DTS Studio Sound there is an option "ENABLE MULTI-STREAMING".
When I turn it on I get this:

kMZKgsz.png (400×455) (imgur.com)

The settings set in this way give the same result as before. The sound is in the headphones, and when I disconnect the 3.5mm headphones from the front jack, then the sound goes from the rear speakers via the same source to the sound / playback called "Realtek HD Audio 2nd output"

The "speakers" option has no function in this case. I can disable it completely, there is no difference because both the speakers and the headphones sound from this "Realtek HD Audio 2nd output"

Now, by some logic, it should be "headphone = headphones"
"speakers = speakers" but not. Now the sound goes from the “headphones” to both the speakers and the headphones.
When I set "default device" to "speakers" I have no sound on either the headphones or the speakers.
tC9b6Mt.png (400×455) (imgur.com)

DTS Studio Sound:
aAoHYUg.png (750×550) (imgur.com)