Wiring Sonoff T1 R2

Hardware
1

Guys,

I bought Sonoff T1 (two way) 1 Gang and I want to push the tasmota firmware. I already did with sonoff touch but this one just looks totally different.

I suspect that on the right I should connect GND, TX, RX, VCC (need your opinion as well) but I have no idea where should i connect GPIO00.

IMG_5249
IMG_52493024×4032 1.77 MB

2

Some info here

3

I somehow did not understand the first time I found the link and that is why I came back to forum to ask for help but after your reply I looked again and tried it and all worked perfectly. Thanks!