Installing Mugen Fan (Thermo) Switch

I have a 90 teg, and had boughten a Mugen Fan Swith (Thermo Switch) for it. They had told me it was behind the thermostat housing and underniethe the intake manifold. Looking at some schem., I found where it should be going, the only problem is the connectors are different. Should I splice into them or am I looking at the wrong spot. I have also heard that the 92-93 might be in a different spot? Just curious if anybody knows. Thanks Chris