In a radio frequency connection and feedline, the signal typically runs in the center, while the ground is around it.
However, in the specific case of this PCB, it has a non-RF connector instead of an RF connector. For convenience, it can be converted into an RF connector interface (which would turn the unknown problem into a known problem that can be solved like other radio stations).🤓). Then you can directly attach the antenna and feed line.
The specific operation involves using a crimping tool to clamp two wires onto the connector, while the other end can be soldered to an M-type, BNC, or SMA connector, depending on your preference. However, if you purchased a kit, it might already include this adapter cable.
The JYR end-to-end solution seems to be a good option, especially considering that the Pixie antennas are likely not permanently mounted. I believe they should be available on Taobao.