How to load relationships on multiple levels?

Question

Hello, I am trying to perform searches in 3 related tables as follows Contracts belongsTo -> hasMany -> company_addresses. I would like to display company_addresses data in the Contracts view.

contracts
    id – integer
    company_id - integer
    title – string 

companies
    id - integer
    name – string

company_addresses
    id - integer
    company_id - integer
    address – string
    complement – string
    contact– string

Model Contracts

public function company()
{
    return $this->belongsTo(Company::class, 'company_id', 'id');
}

Model Companies

public function contracts ()
{
    return $this->hasMany(Contract::class);
} 
public function addresses()
{
    return $this->hasMany(CompanyAddress::class);
}

Model company_addresses

public function company()
{
    return $this->belongsTo(Company::class);
}

Code of the Contract Controller

 public function index()
 {
     $contract= Contract::with('companies.company_addresses')->get();
     return view(‘contract.view')->with(compact('contract'));
 }

So what am I doing wrong and how can I fix it? Any help is very valid.

Thank you from the start.