Extra capacitor on atari 2600 jr - Hack fix or mod?

[H454]

Hi,

I'm to the forum, but after searching around web, I figured someone here my be able to help.

I bought a lot of 2600 jrs and have been repairing them, but one thrown me for a loop:

Soldered from the top of R57 to the bottom leg of R9 (the color pot) is a 47 uf capacitor.

 

Is this a repair? I already have to replace a broken power switch that was hot glued back on to the board.

If it is a repair, what is it fixing? Is it just a bandaid / hack job?

 

Thanks for your help.