Correct. The last chancers 'satisfy' the need for a
HQ and 2 slots but do not occupy them.
The
HQ's get attached out to the units you choose to create.
These units are individual units, and should be rolled for separately as they do not deploy all at once.
They can have 5 units, and if you recall...5 chimeras. 1 for each 'unit'. If you deploy them all together, please show me how you deploy transports across multiple squad formations.
Answer: This is
40K. You don't, you can't.
Don't make life difficult on yourself, just deploy them separately.