Never mind, manage to get it figured out after calling Dell.
We have a Dell PowerEdge T440 with SSD drives in a RAID 1 raid array. We can't expand the Raid 1 disk array so wondering if it possible to add a new disk array using SATA drives in a new RAID array such as RAID10, is this possible? Assume we need the 4 drives added to the server, then using server management create a new raid array and have it be configured then add it to the Windows Server. It would be a new local disk which we are aware of but want to make it ok doing this setup with a existing raid. Server has a H730P raid controller.
Dell PowerEdge T440 - Secondary Raid Array with SATA 2.5 drives alongside SSD 
drives