That one appears to have a slightly different pitch, but looks the same, with similar amperage.
I would assume the capri just happened to have a different one then the 323 series for clearance and wires, but the change is so slight that you can probably get away with it just fine.
Note though that the early 91 engines have different connectors to the Alternator, so if that is the case it might not work.
1991 Mercury Tracer LTS, 10-15 applications.
Beck: 1860741