While there is no wrong way to mount a router to a table, most people prefer using a mounting plate. Most plates provide a location to mount guide bushings, many have different sized removeable center sections, and all are thin enough to let the bit extend fully out of the table surface. With many routers it is easier to pop the plate out of the table to make adjustments or bit changes. I would suggest you go with a mounting plate to get started. One of the nice features is you can switch routers easily between tables. Another advantage is you can build a work top for free hand routing, set it on the table top and use a couple pieces of wood to secure it in the plate opening. This is like having a second work table in limited space.
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