How do I map the key "Enter" to pause the video (1 Viewer)

[Beave]

I used to hit a key on my remote that would pause the video when playing it in external player zoom player. This key was the same as the "Enter" in MP. The Pause key on my remote is in a bad spot so that worked fine. Since TV-Series plug-in has a problem with the external player I decided to try the internal one.
I think I can live with it although I'm missing some features.
Since this is a key I use a lot I would like to add the "Enter" key to pause the video to the currently set space key. When trying to do that in MP Config -> Keys and Sounds I cannot use special keys like "Enter", only simple ones.

Can someone help, please?

 

[Beave]

I'm not sure if my previous post was clear enough. All I want to do is:

Use the ENTER key to pause the video.