I was wondering how to best position the 4 antennas on my Archer X20 (AX1800) for the best coverage in my home. I have a two story home. Due to how the cabling enters the house, the router must be placed near the middle of the house on the upstairs level.  Unfortunately, main computer and TV are on the floor level.  Not sure if two antennas should be pointed vertically and two horizontally.  If so, which two since I have no idea what band each antenna serve.  Currently I have the center antennas vertical and the outter two antennas angled away from the router at about 45 degrees.