What I know is all spark plugs have the same size, so there shouldn't be any difference in term of the connecting plug size. If u're still dubious, just ask the shop that sells u that aftermarket wires to try fitting those wires into ur car.
the connecting point should be the same.b'coz u normally dont find different kinds of spark plugs for different cars rite?so the connecting points are most prob the same but the thickness of the cable should be thicker.as you said its an aftermarket one.