TS10 v2 aux board by r/_master_nate

Hi modders

So I bought these aux boards designed by r/_master_nate around 3 years back, never got around to try them out until now

There is a resistor spot on the board, Nate said I can place a resistor for each color or just bridge them. I think they are for dimming the aux output.

Any idea what value I should use?

What's the best way to mount these 0402 aux LEDs? Would a heat plate work, like the ones used for reflow led on the mcpcb? or a hot air gun? Wouldn't the air just blow them away lol?