Thanks for the reply.
The text from my original post was just a copy/paste from VMware documentation. So it doesn't match my current hardware. I just included it as an example of what I believe should be possible.
I have viewed the model information from the scsidevs command. My SD card shows the following information...
device type: direct-access
display name: local usb direct-access (mpx.vmhba32:c0:t0:l0)
Vendor: HP iLO
Model: Internal SD-Card
I have tried using the following.
--firstdisk=SD-Card
--firstdisk=SD-Card
--firstdisk=Internal SD-Card
Each time the install fails with the following error.
Install --firstdisk specificed but no suitable disk was found. So it doesnt like the model listed as a first disk type.