Precision 5810 SLI with Quadro K5200

Hello,

im trying to run 2 Nvidia Quadro K5200 in a Precision 5810 Tower.

Cards are both installed and detected properly. When an SLI Bridge is installed i am not able to activate SLI in Nvidia controlpanel. 

At the moment i have an 2S HB SLI Bridge which connects both SLI and SDI/Sync. For what i have seen there is also another version which connects just the SLI Bridge an not the SDI /Sync connector. Would it help to buy such an SLI Bridge or does SLI not work in an Precision 5810?

Can someone please help me with this matter ?

Best regards

Dominik