For the via ferrata dei Tre Signori the meeting point is at the funicular of Montecarasso (6513) in Via I Fracc 1. You can find directions here. Parking is very limited but in Montecarasso there are several parking possibilities such as the car park in Er Carà di Sai.
For the via ferrata San Salvatore the meeting point is established with the guide the day before.
Participants are requested to arrive 30 minutes in advance, to consume sufficient food and drink (no alcohol!) and to go to the toilet beforehand.