So you have two tie bars 4" apart. The platens have 3" indents presumably to locate the mould halves. The moving platen (top) has a 2" hole through which the ejector pins pass.

Can we assume the fixed platen (bottom) has a similar hole, which isn't shown, and the nozzle comes up from below, the drawing Y axis, through that hole. It does not come in from above, the drawing Z axis, to hit the parting line.