Vernon, I would be VERY careful when installing these bungs.
Both sides utilise engine mounting bolts as mounting points and the instructions say to fit the right side first, followed by the left.
The RepROM has VERY specific instructions about the sequence in which the engine to frame mounting bolts MUST be torqued down on the K12/13, and failure to follow these instructions to the letter can result in a bent or cracked frame!
The RepROM instructions say that the left side bolts must be finally torqued FIRST, followed by the right side as the left are clamping the engine directly to the frame whereas the right side have sliding bushes through the frame which are finally held in place with lock/pinch bolts.
I would carefully study the RepROM instructions before removing and refitting ANY engine bolts!