Join two nodes Proxmox

Hi everyone,
I am new in Proxmox.
I want to join two server HP ML350P with 2 NIC HP 530T (10G copper).
I think I have to use a cat6A cable for this.
What I have to use:

- a 10G switch?
- a cross cable?
- a normal cable?
Someone told me that this Adapters works also with normal cable ( I mean not cross ), but I don't know.
Can someone help me?
Tks.
Andrea