Soldering is one of those skills that just takes a little practice to perfect. I have previously posted videos on soldering to some larger components so in this video I want to share with you some tips on soldering small jobs. I wrote about this in my March 2020 DCC Corner column in Model Railroader so hopefully this video will fill in some of the details. If you want to develop your soldering skills then get out some scraps and do a little practicing.
On eBay search for Tortoise card edge connectors and for the ones with screw terminals add Accu-Lite to the search.
For the pre-wired LEDs search eBay for 20pcs Pre Wired GOLDEN White SMD 0805 Led. I got 20 for $13.99 including shipping.