Link between RF433 emitter and antenna
You have an antenna pin on the transmitter module and an RP-SMA connector attached to the antenna.

The usual way to connect these is to use an RP-SMA pigtail. That's a coaxial cable with a matching connector on one end.

The solderable end of the pigtail's coaxial cable goes across pin 4 (antenna) and pin 1 (ground). Other modules might differ, always refer to the data sheet of the respective transmitter you end up buying.

If you shop for a matching cable, keep in mind that – since your antenna has an internal thread and a pin – the pigtail's complementary RP-SMA connector must feature an external thread and a hole.