Missing pieces from battery terminal clamps

Hello. I am not very handy at all and neither is my wife. She was trying to replace the dead battery of her 2014 Hyundai Elantra SE and was trying to take off the terminals and dropped at least one piece of hardware (she thinks that it may have been a wing nut and then something else) into the abyss. She think it is on the right side (standing from the front of the car looking into the hood) and I tried to use some magnetic pickup tools but could not find it.


Now I am trying to figure out how to properly secure the terminals because I do not know what hardware she is missing.

This is the negative terminal: https://imgur.com/a/1DOzI03

[This is the positive terminal.](https://imgur.com/a/65RdzYz)

Both: https://imgur.com/a/MRO2QTc

And this is all of the hardware that she has from taking things off but I am not sure where they go: https://imgur.com/a/rXIzonQ

Another look at the hardware: https://imgur.com/a/WnwRsEK


Can anyone provide any assistance regarding how I can find out what pieces and what size pieces I need and where they go? It would be greatly appreciated.

Also, is there some type of dedicated website that would have this information?

When looking at the following youtube video:

https://www.youtube.com/watch?v=-tdNN8GjTZc

It seems I am missing some weird shaped top piece to my negative terminal. Most terminals I see online are all side ways facing bolts and I cannot find anything that looks like the one in the video. I am at a loss for what to do. Any and all help would be greatly appreciated.