RSGooner

Hope someone can help, putting 2.0 zetec into a mk3 cab, I got inlet manifold from eBay and engine loom from someone on here, unknowing to me there seems to be different types of plugs on connections of loom to manifold, one has a round connector and other end is square, is it possible t.o cut connectors off and wire together or do I need matching looms? Any help much appreciated