The connection is not correct as they told you, but it seems to me that what you are trying to say without having written it ... is that you are afraid that you will be short of the 32A
If so, comment. Since you mentioned a welder plus AA and the typical consumption of the house, it would rather come to extend the supply
It is not quite right but it goes ....
The general TM goes first but it is a subject quite discussed between the electricians, there are those who agree and those who do not ... the returns of 1mm² at least until today are anti-regulation. There is a new regulation not yet in force where it will be allowed to use 1 mm² but until it enters into force the minimum is 1.50 mm²
The rest is fine as long as the shots are 2.50 mm² and both circuits do not exceed 15 mouths per circuit
Another important point that was not discussed is the grounding
In lighting circuit and minimum sockets 2.50 mm²
In the lower minimum 6 mm² assuming that the circuit that feeds the house is 6 mm² since 4 mm² would not be correct for the TMG of 32
Grounding is important and if it does not exist you must incorporate it