Your server has six ports total. Three ports are hot swap (all in use). Three ports are internal only.
So a downtime will be required to install the drive. If it comes with a SATA cable, please send it with the drive. We have an order for more right now but it's going to be a few days before it gets here.
We operate on Central Time in Kansas City, MO. Let us know what time of day works for you to have the drive installed in Central or UTC or your own time zone and we'll schedule to accommodate you. Tentatively for now, and specifically once the drive is here.