There's two front cam seals behind the cam sprockets. The cam sprockets are bolted to the the end of the cams each by a bolt (12mm/14mm socket).

There should be two rubber rear cam plugs that the valve cover gaskets fit over but are RTV'd to the head. The plugs are hard to get to.

Did you remove the upper cam sprocket covers? If the cam seals are leaking then you'll have oil down into the timing belt and bottom cover. The valve cover needs RTV at the sharp edges where it rest against the cam caps.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles