[Greg]

Hello,

There are 4 nuts on top of the RF chassis that hold the bottom cover on. Remove them and off it comes.

   

The cover looks like this:

   

This is what's underneath, or should I say above:

   

I usually label the wires and draw a picture showing their destinations and their assigned number. I think there are 16 wires that connect the RF chassis to the rest of the radio. I would also recommend taking photos if you can.

Good luck.