Hello I just bought a 1993 mobile home. It was at one time a rental home. And the last tenants sole the breaker box out of it. I know it org. had a 100amp box in it. Idon't need a bigger box I just won't to put the same amp. Box back in it. All I
Have is a bunch of wires hanging out of the wall. What do I do to fix this.

Honestly, no offense intended,if you need to ask, you really need to contact someone to install and connect the box correctly. There are so many things you need to know to install a panel that we cannot teach you here.