Building my first laser need help!

[cool qwertyuiop]

I understand how to build the whole thing, except I am confused on how to solder the back of the driver I know that I need to solder the + and - leads to the top of pcb, but the back of it- do I need to make a solder connection from the outer ring to the host? I am using a 20mm Buck LED/Laser Driver - 6V to 14V - 5-Function - 250mA - 1000mA Output.

Here is a picture if you don't understand, I am wondering if I need to make solder connections where I drew red dots? (I haven't started soldering yet just want to make sure I do everything right)

 

[gazer101]

Yes, there should be a reliable connection from host - to driver input -

 

[paul1598419]

You will need to solder the connection you pictured here, but I would reconsider the use of an LED driver as they are noisier than laser diode drivers and can damage or kill your diode.

 

[RedCowboy]

Not if it's a tight fit, the round drivers are designed to make contact at their perimeter, if it fits tightly you typically don't need any solder.