Okay, I found it as well finally.  That DZ chip is for hard wiring.  My model is DCC ready and other chips are less expensive than this one.

That chip does not seem to be listed on their website any more.  I guess it is no longer available, unless it is brand new?

I am looking to use the  DH165IP  chip or a z scale chip that fits.  I will let you know after I get a chip that works.

I was hoping to not have to remove the shell until it was time to install the chip.  From what I have gleaned from this forum, someone else had the same or similar question.  He decided to use an n scale chip with a long wire harness after trying an HO chip which would not fit under the shell and the n scale chip with the short wire harness did not allow the chip to find a "hiddy hole", but he was successful with the long wire harness.

I just purchased a S-2 that is DCC ready via eBay.  The model appears to be new in the box as I could not see any wheel wear and the coupler hoses have not been adjusted.  What I am wondering is which DCC chips can be used in this model?  I normally use the Digitrax DCC chip finder program to find a Digitrax chip, but none are listed for this model.  I normally use Digitrax because the model train club I joined uses a Digitrax system.  If another non-sound chip can be used, which one(s)?  I plan on running it with my DCC/sound S2 that I already have, so I do not need sound in both models.....   Thank you.