Where does the TNT Scoreboard file go?

I downloaded the TNT Scoreboard patch, and it is labeled...overlays~score.big, the patch did not include a readme file.

Where does this file go?

It definitely doesnt go in the SGSM folder, because I put it in there, and it turned the whole court black. Can somebody tell me where this file goes?

it should go into the sgsm.
big files always go into sgsm along with fsh. viv ones mostly go into their respective folders.