After some search to mod LD29 but no luck something I found was other version .Need some advice to increase some current from 3 to 5-6A …Thanks in advance.
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found a solution?
There are components on the back side of the main PCB. You’ll have to remove the carrier/contact board. The sense resistor must on the back side.
Yes, I found, there is a resistor R020 near the black wire. What is his resistance, tell me? I can not find this one in our store
R020 = 20mOhm or 0,02 Ω
I do not know the driver but usually increasing the sense resistor reduces the output and decreasing the sense resistor increases the current.
It turns out it’s just a jumper?
Why do you think its a jumper?
just we have resistors less than 1 ohm, called a jumper, more precisely where I buy 
That R020 is not a jumper. It’s a 0.02Ω / 20mΩ resistor - a small but exact value. Jumpers are always supposed to be 0Ω.
I’ve never seen such low-value resistors sold in a physical store, so you might have to order them online. Here’s one option to get a selection to experiment with:
Make sure they’re the right size, though. These ones are about 6.35mm × 3mm.