When you get to Nigüelas:

You enter the village by the main street. About 100 m along take "Larga" street on the right. Go to the end of the street where you will see La Solanilla in front of you (number 36). (Do not try to turn the corner at the end as it's too narrow and doesn't lead anywhere).

The street is too narrow to park, so once you have unloaded your things you will have to leave the car in the municipal parking area at the entrance to the village (no charge).