Hehe, I definitely couldn’t speak for Mando, but I didn’t think either song went off of any canon to begin with!

When Mando first approached me to ask for art to go along with the idea, he mentioned that he just wanted to make a song based off the second game. And perhaps moreso to reference off a security guard that may be watching the animatronics throughout the night. 

(In the first song) The animatronics notice the guard, invites him to join their band, attempts to make him ‘look the part’ with a new suit. (Second song) Their new friend is unresponsive (dead) after their change, but despite being saddened that they’ve lost a new member, they know that the ‘show must go on’.

But as far as I know, there’s not necessarily any deeper meaning intended to come from the song. Pretty much goes as far as the lyrics. :)