VLT backup link needs to have a physical connection?

Hi all

Can I ask a question I just finished configuring my core switch with VLT Domain but my heartbeat status is disabled, I already configured backup destination for both vlt peer 1 and 2

I just want to clarify if the OOB port at the back of my s4810 needs to have a physical connection in any of my other switch or do I need to cascade the oob port in my S4810-1 to my oob port in my S4810-2

I just want to test the backup destination link if I disconnect the VLTi I think backup destination will be the one to carry the load

Thanks in advance

BRENT