Put the good bug on the safe door and back up a step. Put the radio device in the viewing window and turn it on. Click an empty slot, to put the device there. Get a close-up of the safe door and start trying to input the correct combination. One way is to punch 1 first, and the rest 0's. If you don't hear a clunk heavy click, try the 1 in a different position and the rest 0's. By doing this you determine whether or not the 1 is one of the six required digits. Do this by putting the 1 in a different position each time until you have tried it six times. Use the same method for each of the other digits. You eventually get six digits but not necessarily in the correct order. In my case they were 579824, in that order. My reward was a video tape.
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"Once you give up integrity, the rest is easy." Anonymous