Question about an old tutorial USB Controller

[oreosxe]

https://www.acidmods.com/forum/index.php/topic,27388.0.html
I was looking at the above tutorial. It is isn't super clear. Is this for using external controllers on the DS? or using the ds as an external controller. I am looking to do the latter and was seeing if this would be helpful to me.

[RDC]

That has nothing at all to do with using a USB controller on the DS, or the DS as a controller per say. It is merely using a USB connector as a 5 pin connection to have access to the D-pad connections of the DS, nothing more. All you could do there is wire up 4 buttons to your USB connector and use them instead of the D-pad, or wire it up to some other controllers D-pad and use the DS D-pad instead but that's all, and soldering to the contacts like that ruins them anyway.