In Wadi Musa the streets have no names. The B&B is located in the area called Garara, above the so called ‘tourist street’. The road up the mountain to the B&B Petra Fig Tree Villa is pointed out in yellow on the map below. If you come by car from Wadi Musa you can follow the blue line to get to the point where you need to climb up the hill to the B&B. If you come from Little Petra you can follow the green line. And if you are on the parking close to the Petra Visitors Centre you can follow the red line to get to this point.
There is a new road that avoids town. You can use it when you come from Wadi Rum and Aqaba. It’s the purple line on the map.
Or you can use GPS coordinates 30.329359, 35.472518.
This is the link to the B&B on Google maps.
I can send you my location if we are connected on Whatsapp. Just let me know if you want this.