Are you talking about looking through the hole in the tunnel under the shifter? That is the shift rod bushing. It is a little neoprene piece that slips over the shaft and snaps into a bracket welded inside the tunnel. $2.00 will get one, try
www.cip1.com or
www.eisparts.com. Another problem area for shifter slop is the coupler where the shifter shaft connects to the shaft sticking out of the transmission. Those cost about $8.95. If your buggy has the normal buggy pan and tunnel there is a little oval shaped cover on the back of the tunnel right beside the battery box, remove one screw and you can see the coupler, the holes where the long bolt goes through get wallowed out and makes it hard to find the gears.