can i plug in my usb 3.0 connector into my mobos 3.1 connector?

Solution
Yes, if your motherboard specs says "USB3.1 Gen1", then it's a 19-pin header which is actually a USB3.0. Very few motherboard have the USB3.1 (labelled as "USB3.1 Gen2") internal headers, in which case you need a hard-to-find USB3.1-to-USB3.0 internal adapter cable.

USB3.0 (or "USB3.1 Gen1") headers are like this:
attachment.php


...which can accept your USB3.0 cable
1619529-c.jpg


USB3.1 (i.e., "USB3.1 Gen2") headers are like this:
main-qimg-6cb9ed8ce601f0020d0d102f67259051-c
Yes, if your motherboard specs says "USB3.1 Gen1", then it's a 19-pin header which is actually a USB3.0. Very few motherboard have the USB3.1 (labelled as "USB3.1 Gen2") internal headers, in which case you need a hard-to-find USB3.1-to-USB3.0 internal adapter cable.

USB3.0 (or "USB3.1 Gen1") headers are like this:
attachment.php


...which can accept your USB3.0 cable
1619529-c.jpg


USB3.1 (i.e., "USB3.1 Gen2") headers are like this:
main-qimg-6cb9ed8ce601f0020d0d102f67259051-c
 
Solution