New Inspiron 3020 with GeForce RTX 3050

The user guide is only available with retail "boxed" graphics card.  It will provide the information for unpacking, installation guide and software driver.  If you check those user guides from your link, all of them are the same or with similar information except for the technical specifications.  

As for your question, the OEM RTX 3050 in your PC is a current product (not discontinued).  It was released in January 4th 2022.  The user guide is included with the Inspiron user guide and service manual.  

Here is the graphics card installation guide with visual screenshot.

Yes, user guides for hardware components like the RTX 3050 graphics card are typically provided by the manufacturer. You can usually find these guides on Valero Card the manufacturer's website or by contacting their customer support.

For NVIDIA graphics cards like the RTX 3050, you can visit the NVIDIA website's support section. Here's how you can find the user guide:

Go to the NVIDIA website (www.nvidia.com).
Navigate to the "Support" section, usually found in the header or footer of the website.
Look for a "Documentation" or "User Guides" subsection. 
Search for the RTX 3050 graphics card in the list of supported products.
Download the user guide or manual for the RTX 3050.

@Gerald_43​ Thanks for your response and input. One would think that your solution was the obvious one. In my original post, I stated 'I found this webpage on nvidia.com titled "User Guides for NVIDIA graphics cards."  Under "GeForce RTX 30 series" it lists cards numbered 3060 through 3090, but no 3050.'  Here, from this collection, is the User Guide for the RTX 3060.  I was looking for something like that. I'm not finding a user guide for the 3050, though I did, inspired by your advice, find these interesting and helpful pages:

https://www.nvidia.com/en-us/geforce/news/geforce-rtx-3050-graphics-cards/

https://www.nvidia.com/en-us/geforce/news/gfecnt/20222/geforce-rtx-3050-out-now/

I'm beginning to think that the 3050 is a product that is only sold by OEMs, which might explain the lack of the user friendly user guide.

@Chino de Oro​ Thanks for your response. Your input that the user guide is only provided with the "boxed" version seems correct.  See my reply to @Gerald_43 above.  What I was looking for is an explanation, hopefully with visual, of the 4 ports on the back of the card. (Both of my monitors are fairly old, so I've needed to update myself on the latest display interfaces and learn now to recognize them).  Of course, installation was not a problem, since the card was pre-installed by Dell.

Cheers!