Hi @jimmysofat6864 ,
Here’s an image from this Lenovo manual that shows how to connect the cables to your make and model WLAN card. (there is no page numbering in the document so go to p.32/50 - pdf page numbering)
Looking at the image the cable colours are grey - white - black.
(click on image to enlarge for better viewing)
This is assuming that the same colour cables connect to the same type of antenna in your laptop as they do in the Lenovo.
You could try downloading, installing and then running a free WiFI network discovery tool and check the signal levels of your 2.4GHz and 5 GHz WiFi networks to see if the signal levels are stronger before or after reversing the black and white cables. Getting the actual signal strength value in -dBm is better than relying on the number of level signal bars shown by the PC or maybe even the data speed.
The WiFi signal levels shown by the program will be in negative dBm (-dBm).
This means that the higher the -dBm signal level number, the weaker the signal is. The lower the -dBm signal level number the stronger the signal.
A stronger signal means that the WiFi connection is more stable, less prone to interference and that more data per second can be transmitted/received.
Every 3dB is equivalent to either double or half the power depending on which direction the level is heading e.g. -60dBm is 2x the power of -63dB but is only 0.5x the power of -57dB.
Here’s a link that shows what the signal level strength in -dBm can mean to a network connection.
Interference can occur by other networks that are close by, with a strong signal operating on the same WiFi channel as your network. This can cause your network to slow down. Change the WiFi channels in your router to a “quiet” channel i.e. select a channel number that has no appearances in the program. Most WiFi routers are set to either CH1, 6 or 11 out of the box and mostly people don’t change them so there are a lot of networks all operating on the same channels. Normally this doesn’t matter unless they are very close to each other (next door apartment?) and have a strong signal level.