Ciao Danielle,
The only Scarola I have is
Rocco Scarola born in the early 1900's in Grumo Appula. He married Vincenza Nuzzaco (born 1900) in Grumo in 1925. Her mother was an Abbinante and that's who I really connect to.
The only Siletti I have is Domenico, born in 1836 in Bitritto
He married Anna Donata Di Cosola in 1886 (must be his 2nd marriage) in Carbonara in 1886.
If you're having trouble finding the exact town in Italy (when they say Bari they usually mean a small town NEAR Bari) try these two towns for these surnames.
Sadly I have nothing more on those names a this time.
Hope this helps
Dan N