Help Identifying Terminals

[Bigpal]

Hello everybody,
I was wondering if someone could help to identify the negative connection on this driver.
The red line denotes the + connection, which I know. The messy green circle shows where I believe I see the - marking and the black line shows where I think the - wire should be soldered. Anyone know if this is correct? If not, where should the - wire go?

[image removed - solved]

Thanks a lot.

 

[VegasF6]

It goes on the blurry part.
LOL.
Can you share with us where you got it from and perhaps a sku?

 

[Bigpal]

It goes on the blurry part.
LOL.
Can you share with us where you got it from and perhaps a sku?

I know, not the best pic. It came out of an inexpensive light. Beamtech 4000, which was driving 3 XML-T6 LEDs with one 18650.
I did not like driving 3 XMLs with one cell so I would like to use this driver somewhere else and rebuild this light with an extension. I think it is a boost driver that puts out 1.9 amps (not very certain about that though). since the LEDs were in series, would that mean it is a voltage boost driver? I unfortunately have no SKU.

Trying to solve a murder with no leads, right? I'll try to get some more info on it. Thanks for replying

 

[VegasF6]

Are you sure they were in series? Did you measure the voltage drop across the 3 leds while lit?
Only reason I ask is I don't see any sort of inductor. It's only single sided, correct?
It reminds me of the 2 transistor style buck drivers that DX and KD sell such as sku 106799, 106797, 128273 etc. They seem to take the output from one leg of a diode. I dunno, sorry I couldn't be more help. I guess you weren't able to see where the original flashlight tapped into the circuit? If I had to just guess I would say yes, where you have your black line is, is correct. Personally, I would connect it to a couple low ohmage power resistors and try that first before I risked an led. Say anything from 1 to 3.3 ohm at 10 watts. I won't guarantee it won't burn it up, but probably not :)