Fritz!box tool und smarthome Intergration

Hello,
Iam using Home Assitant since two days.
I do not know who is respossible for this question, therefor I used Uncategorized.

I want to integrate a second fritzbox where I have an other IP from external over the internet.
“German Fernzugriff”

Here I have two problems.

First, it seams not possible to have two firtzboxes available.
Is this right or is there an mistake by me?
How I can have two integration?

Second point, if I external IP from the second external Fritzbox as Host it will not work.
Is this right or is there an mistake by me?
How I can enter an external IP?

Thanks for your help

Hello I want to give some feedback for other user.

If the ip address range is the same, the integrateion will found also more Fritz devices.
This point is solved an manually integration is not necessary.

Open is only my main question.
How I can integrate an Fritzbox with an other Ip range where I have only acess with MyFRITZ!-Internetzugriff or “German Fernzugriff” ?

Here I have the
myfritz Adress
user and password

Can someone please give me a friendly hint

Thanks