the pesage or in english in the text "technical verifications" won't take place either on the circuit or on the Jacobins square.
As the local authorities want to inaugurate a new auction house dedicated to cars sales, it gonna take place on its parking.
This place is located "Boulevard D'Estienne D'Orves".
When you'll be at the circuit, go in the direction of the city centre. I guess everyone remember the little bridge which go up to the road. You'll have to pass under by driving the right lane and then turn on the left, following the direction of Alencon and Laval. When you'll be on that road, you'll be on the good road so just continue straight and the place would be on your right.
Coming from Alencon, you'll take the usual road to gain access to the circuit. You'll have a Nissan car dealer on your right. Take the left lane and be prepared to turn on the left at the traffic light. You'll be able to park on the Champion parking, the place is on the other side of the raod just besides the hotel.
I hope all these directions are clear.