how to know which signal is called a certain slot?

[Alex22]

Hi,
There are 5 Classes and from each class I have 4 objects. When each object (each of these 20 objects) change , signal of that is emitted and calls a certain slot. for example:

connect(obj1_0, SIGNAL(sig1()), this, SLOT(myslot()));//obj1_0 is a type of Class1
connect(obj1_1, SIGNAL(sig1()), this, SLOT(myslot()));
connect(obj1_2, SIGNAL(sig1()), this, SLOT(myslot()));
connect(obj1_3, SIGNAL(sig1()), this, SLOT(myslot()));
 
connect(obj2_0, SIGNAL(sig2()), this, SLOT(myslot()));//obj2_0 is a type of Class2 deference from Class1
connect(obj2_1, SIGNAL(sig2()), this, SLOT(myslot()));
connect(obj2_2, SIGNAL(sig2()), this, SLOT(myslot()));
connect(obj2_3, SIGNAL(sig2()), this, SLOT(myslot()));
.
.
.
.
connect(obj5_0, SIGNAL(sig5()), this, SLOT(myslot()));//obj5_0 is a type of Class5 deference from Class1, Class2,  Class3,  Class4
connect(obj5_1, SIGNAL(sig5()), this, SLOT(myslot()));
connect(obj5_2, SIGNAL(sig5()), this, SLOT(myslot()));
connect(obj5_3, SIGNAL(sig5()), this, SLOT(myslot()));

connect(obj1_0, SIGNAL(sig1()), this, SLOT(myslot()));//obj1_0 is a type of Class1
connect(obj1_1, SIGNAL(sig1()), this, SLOT(myslot()));
connect(obj1_2, SIGNAL(sig1()), this, SLOT(myslot()));
connect(obj1_3, SIGNAL(sig1()), this, SLOT(myslot()));

connect(obj2_0, SIGNAL(sig2()), this, SLOT(myslot()));//obj2_0 is a type of Class2 deference from Class1
connect(obj2_1, SIGNAL(sig2()), this, SLOT(myslot()));
connect(obj2_2, SIGNAL(sig2()), this, SLOT(myslot()));
connect(obj2_3, SIGNAL(sig2()), this, SLOT(myslot()));
.
.
.
.
connect(obj5_0, SIGNAL(sig5()), this, SLOT(myslot()));//obj5_0 is a type of Class5 deference from Class1, Class2,  Class3,  Class4
connect(obj5_1, SIGNAL(sig5()), this, SLOT(myslot()));
connect(obj5_2, SIGNAL(sig5()), this, SLOT(myslot()));
connect(obj5_3, SIGNAL(sig5()), this, SLOT(myslot()));

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I am using QSignalMapper for this and defined 5 objects of this class for all of Class1,...,Class5 like obj1_signalmapper, obj2_signalmapper,..., obj5_signalmapper by a "int id". But I need to know which object and from which kind of class send signal(for example know first: obj1_2 send and seccond:from type of Class1). I can know obj id but I can not know this object is for which class because obj1_3 has the same "id" that obj5_3 has.

Thanks for any help.