IBM X3550 M4 Moving Raid disks from one server to another

My IBMx3550 M4 server failed and I have purchased the exact make and model. I have moved the RAID disks into the new serve but cannot find the RAID controller.I went ahead and I moved the RAID controller card from old server to the new server still not picking up the raid.
I placed the Raid disk back to the original server but not loading the OS. Looking at WEB BIOD All RAID showing as foreign disk slot. How can I import the RAID without losing data.
I am new in this any help will be appreciated.