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How can I extend motherboard W-Fi/Bluetooth? (re: two antenna jacks; do I need two extensions?)

I have a server rack with a bunch of different equipment including one server that has a WiFi/Bluetooth card. (I need the bluetooth capability, but not WiFi).

The signal inside the rack is probably terrible so I’d like to use an extension (20ft) to place the antenna in a better location.

However, most WiFi/Bluetooth cards have two separate antenna jacks. I’m not sure the purpose because I took apart the included antenna and it had two PCB-trace antennas that looked exactly the same so I don’t think they are tuned for different frequencies).

My goal is to extend the bluetooth signal (2.4 GHz).

Can I use RP-SMA adapters and extend over RG6 coaxial cable?

Do I need to connect both RP-SMA jacks on the WiFi/Bluetooth card? If so, can I use a simple Y-splitter to connect them to a signal extension cable?