A quick test for speeds and connector can be done with “lsusb -t”. This will show you the connections and whether they are USB2 (480M) or USB3 (5000M). I had it showing up as 480 and when the system was powered down and the connector firmly seated, on reboot I showed as 5000M.
Should look rather similar to the following (lsusb;lsusb -t).
Bus 002 Device 002: ID 152d:0561 JMicron Technology Corp. / JMicron USA Technology Corp. JMS551 - Sharkoon SATA QuickPort Duo
Bus 002 Device 003: ID 152d:0561 JMicron Technology Corp. / JMicron USA Technology Corp. JMS551 - Sharkoon SATA QuickPort Duo
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
|__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=uas, 5000M
|__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=uas, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M