In order to make sure the LMC wouldn't be wracked by rudderless leadership, Ves made it so that he could appoint an agent to make decisions on his stead on the board.
The only problem was he needed to appoint someone he could trust with an incredible amount of power. After all, the LMC was a growing multi-billion credit mech manufacturer with bright prospects. It only took one power-hungry madman to topple everything that he built in the past two years.
As Ves tried to wrack his brains for possible candidates, he started to get a headache. "Carlos would have been a perfect agent for me."
He knew his friend inside and out and knew that he didn't enjoy the backing of anyone else. As someone who benefited hugely under Ves, Carlos could certainly be trusted to value his interests over those of the other Larkinsons.
A significant shortcoming of Carlos was that he never excelled in any of the business courses, so he probably wouldn't be able to steer the LMC as well as Ves.