![electrical - What's the proper way to replace a wall switch with two black wires? - Home Improvement Stack Exchange electrical - What's the proper way to replace a wall switch with two black wires? - Home Improvement Stack Exchange](https://i.stack.imgur.com/sajRG.jpg)
electrical - What's the proper way to replace a wall switch with two black wires? - Home Improvement Stack Exchange
![Two black wires connected into a single black wire in light switch box - Home Improvement Stack Exchange | Light switch, Light dimmer switch, Dimmer light switch Two black wires connected into a single black wire in light switch box - Home Improvement Stack Exchange | Light switch, Light dimmer switch, Dimmer light switch](https://i.pinimg.com/originals/28/ae/94/28ae94c6b17004bfea0cdbfba8dbf891.jpg)
Two black wires connected into a single black wire in light switch box - Home Improvement Stack Exchange | Light switch, Light dimmer switch, Dimmer light switch
![I can't figure out how to connect the existing wires in my kitchen light switch to the kasa smart switch. The upper black wire appears to be a common but it doesn't I can't figure out how to connect the existing wires in my kitchen light switch to the kasa smart switch. The upper black wire appears to be a common but it doesn't](https://i.redd.it/lq2dghry9bj61.jpg)