This is a set of two screw - type terminal blocks from Circuitron. They're designed to be soldered onto the Smail circuit board, enabling easy under - layout connections for all scales.

Using these terminal blocks is easy. First, make sure your Smail circuit board is clean and dry. Then, carefully solder the terminal blocks onto the board. When making connections, ensure the wires are properly inserted and tightened. Be careful when soldering to avoid overheating the components. For maintenance, regularly check the connections for any signs of looseness or damage. If you notice any issues, you can re - solder or replace the terminal blocks as needed. Keep them in a dry place when not in use to prevent corrosion.