If a co has > 1 location, then youd have that many choices in the tCo table:
CoKey, CoName, CoAddr...
123, Acme, 123 Main St
144, Acme, 444 W 9th ave
888, Acme, 888 Oak St
youd need either:
a combo to see all co names and addrs
Acme, 123 Main St
Acme, 444 W 9th ave
Acme, 888 Oak St
BoA , 54436....
then upon choosing, the CoKey would get inserted
OR
combo to pick Co Name:
Acme
BoA
combo 2 to pick WHICH Acme
123 Main St
444 W 9th ave
888 Oak St
Then the CO TYPE combo would be based off CoName and its choices set in Company2CompanyTypeTbl