LOM vs. NIC for iDRAC with Dell PowerEdge R720xd

I'm trying to get going with iDRAC 7 Express (no Enterprise license so we can't use the dedicated port). In the setup menu for iDRAC, it asks to choose which network interface to use for iDRAC. There are four choices: LOM1, LOM2, LOM3, and LOM4. The server has 4 Broadcom NIC ports. Does NIC1 correspond to LOM1, NIC2 to LOM2, and so on?

What I find slightly puzzling is that, as expected, each individual NIC port has it's own MAC Address. However in the setup for iDRAC, the MAC Address for iDRAC appears to be static regardless of which LOM I choose. The only thing that I can think of is that the NIC port is simply "re-directing" the connection to the iDRAC controller, and therefore that static address is for the controller, and not the NIC port.

Currently the machine is getting it's regular connection (not iDRAC) through NIC1, so I assume that I would want to NOT choose LOM1 for iDRAC.

It doesn't matter iDRAC7 Express does not have a dedicated NIC, you should be able to share other onboard ports.

Available modes are:

Dedicated, Shared, Shared with Failover LOM2, and Shared with Failover All LOMs.

You may have issues with iDRAC7 Express if you try to use NIC teaming.