Dave might name this Station Location K1ZZ-Coventry, incorporating both the callsign and the operating location for easy recall.
If Dave were to operate occasionally from the US Virgin Islands, he would obtain a Callsign Certificate for KP2/K1ZZ specifying the US Virgin Islands as its DXCC entity, and then define a second Station Location for a QTH in the town of Cruz Bay on the island of St. John:
This Station Location might be named KP2/K1ZZ-CruzBay, again incorporating both the callsign and operating location.
When using TQSL to digitally sign a file of QSOs made from his home in Coventry, CT, Dave would select his K1ZZ-Coventry Station Location. When using TQSL to digitally sign a file of QSOs made from Cruz Bay, Dave would select his KP2/K1ZZ-CruzBay Station Location. TQSL would use this information to digitally sign the file and optionally upload it to LoTW.