How to find original mac-address (bonded interfaces)

I want to check original mac-address on port of datadomain.

My datadomain has 2 ports (eth3b, eth4b) as member of veth1.

I try to use command "net show hardware", the mac-address of eth3b, eth4b already same.
Is there any way or command to find original mac's for both bonded interfaces on datadomain?