Arduino SSR 5V DC (Mager GJ-3FA-L)

I just noticed this SSR that was for DCV instead of all the others that are normally for AC.

Although I can not find the datasheet for it, it does seem compatible with Arduino. eBay auction site and also here is where I found it.

However, I am just wanting to double check 2 things here:

1. 
   

   My thoughts on how to go about wiring it:

   
   

   

   
   

   I have 2 scenarios here. One that runs 12V out and another that does ground. Is this SSR capable of doing the 0vdc out since I am seeing the output is 5V-220V DC? I'm using the 0V DC to "push" a button (pushing = grounding it) so that the object it's connected to turns on or off.

   
   


2. 
   

   I gather that when I send 5V DC to the SSR (via Digital Pin 1 or 2) it will open up the line for the 12V/0V to flow out the negative (-) side? Not sure if these are NO or NC? And as a side note, the diagram in the picture and the label on the SSR itself seems to be backwords? It says +/- and +/- while the diagram says -/+ and -/+?

   
   

Addition:

This image shows that they have some resisters in place:

Can anyone tell by those images above what type of resister they are using? Seems to me they are dropping the voltage by that on the arduino board side?