@Wayne-TP 

Hi Wayne, thanks for replying. We are talking about different products here. You are talking about the switch that is installed on the wall that controls other Tapo devices. I am talking about a relay module that is connected in-line on a power cable. This should be clear from the image I attached in my frist post. As far as my searches show TP-Link does not make this product.

Currently there are two solutions, one, to tear the smart plug apart and solder the cables directly onto the PCB, and two, to buy floating male and female plugs to connect bare wires without damaging the smart plug plastic housing. Option two is the better one as the product does not need to be damaged, but it is an additional expense.

While we are on the subjet, it would help if the smart plug plastic housing was held together by screws, instead of being glued. If you read the reviews for this product on Amazon, you should know by now that the cheap relay it uses eventually stops working. This is a common problem with electromechanical relays and is easy to repair for those of us who know how to repair electronics, simply by replacing the relay. I know TP-Link will copy-paste the official statement that this product was not designed to have any user-serviceable parts but everybody knows the real reason is TP-Link hopes the product will break so users buy more of it. Be aware that the European Comission has already submitted a Right to Repair Proposal and soon TP-Link will be required to remove essentially ALL your existing non-repairable products from the market.

https://ec.europa.eu/commission/presscorner/detail/en/ip_23_1794

I bought 8 P100 and 12 P110 smart plugs on Amazon for a project I'm working on, to control regular flush-fitting bulbs. I know Tapo offers smart bulbs but 1) they make a buzzing noise, 2) they are not bright enough, 3) they cost more than regular 'dumb' bulbs, and 4) I cannot control multiple lightbulbs with a single wI-fi device (each bulb is one separate client), so smart bulbs are a very unattractive solution for me. If the product was easy to open without damaging it, I'd be able to modify it so I could attach wires to it for the purpose I am requesting here, and keep the plastic housing unharmed in case I need to convert it back to a smart plug in the future.

In any case, it would be better if TP-Link offered a module for connectin wires directly. One important advantage of this product from TP-Links perspective is that it could be made to work universally in any countries because it wouldn't need a country-specific plug+socket.