1 - Remove the console block from the rear of the machine.
2 - Remove a serial port panel from the rear of the machine.
3 - Move blanking plate fro beside console block to where serial block
    was removed from.
4 - Disconnect one D25 plug - the port opposite the ribbon connector is 
    easiest to work with.  There are several tracks running down the right
    hand side (looking at the PCB) from the top connector, three of which
    come from the other side just under the top connector.  Cut these.
    (See the image link below, the cut is visible on the right of the 
    serial board)
5 - Remove the battery holder (3 screws) on the console block.
6 - On the back of the D9 console connector, solder together pins 8 and 9
7 - Connect 8 inch (or so) leads as follows:
    D9 (console)  D25 (RS232)
         1 ------- 1
         2 ------- 2
         3 ------- 3
         7 ------- 7
8 - Replace the battery holder, wrapping the wire around it near the bottom
    screw (not the actual screw, the white plastic).
9 - Place the console and serial blocks back in the MV2.  
A - Label the RS232 port 'CONSOLE'

This new port can now be connected to either a terminal or a PC running terminal emulator software. Turning on the MV2 should cause a message to be displayed within a second or so...

What we were doing...
 b   a   9   8   7   6   5   4   3   2   1
 # - # - # - # - D - # - # - # - R - R - C
 # - # - # - # - I - # - # - # - . - . - .
 # - # - # - # - S - # - # - # - A - A - P
 # - # - # - # - K - # - # - # - . - . - .
 # - # - # - # - C - # - # - # - M - M - U

 # - # - # - # - G - # - # - # - R - R - C
 # - # - # - # - R - # - # - # - . - . - .
 # - # - # - # - A - # - # - # - A - A - P
 # - # - # - # - N - # - # - # - . - . - .
 # - # - # - # - T - # - # - # - M - M - U

What works...
 b   a   9   8   7   6   5   4   3   2   1
 # - # - # - # - # - # - D - A - R - R - C
 # - # - # - # - # - # - I - S - . - . - .
 # - # - # - # - # - # - S - Y - A - A - P
 # - # - # - # - # - # - K - N - . - . - .
 # - # - # - # - # - # - C - C - M - M - U

 # - # - # - # - # - # - # - A - R - R - C
 # - # - # - # - # - # - # - S - . - . - .
 # - # - # - # - # - # - # - Y - A - A - P
 # - # - # - # - # - # - # - N - . - . - .
 # - # - # - # - # - # - # - C - M - M - U