how do you access the top shock mounts (rear) on a c70 conv????????

I have a obd code #P0705 Transmission Range Sensor Circuit malfunction (PRNDL Input) on my 1996 850. is this a solenoid or a internal malfunction or both? Is this repairable by a beginner? if so where is the part located? Thanks for your input.

Ive got a check engine light on and would like to hook up my OBD 2 scanner to check the codes but I dont know where the connection port is located. Please help