Hi Abhishek,
If you carefully look at the table you have posted you will notice that connections are exactly same as what KAI said. Let me first mention the points KAI said in his various posts for your reference.

*0. Kai never said that you should run your power supply through ribbon cable. When he says every alternate wire must be ground. This ground is not meant for power supply connection but for signal ground return.

*1. For cables carrying signals from one board to the other It's a good idea, to use a flat cable for this purpose, where each second, or at least third line is a ground line. All these ground lines MUST be connected to ground at each board!

*2. Two different digital signals must always be separated by certain distance, so that toggling of one line will not propagate to other line due to charge injection via stray capacitance. If both digital lines are very close to each other and you toggle one of the lines very quickly, then you will notice a very fast spike on the other superimposed to its signal.

*3. One way to prevent such cross coupling is to shield the different signals to each other, by routing a solid ground plane between them ***Remember in case of a ribbon cable alternate ground does the same job a grounf fill on your PCB.

*4. Sometimes it can be seen, that bus signals are routed very close to each other, even when no ground plane is very close underneath. As long as the signals belong to the same bus, where all signals are simultaneously clocked, means toggled, then a bit stray capacitance can be allowed if source impedance of drivers is very low and bus timing is not too fast. Then, injected charge due to cross coupling can be removed again before data on bus is latched

Now coming back to the table you have posted.

| 1 | -Reset | <- | B2 |
| 2 | Ground | | B1 |

You have a ground accompanying /RESET signal.

| 3 | D7 | <-> | A2 |
| 4 | D8 | <-> | C11 |
| 5 | D6 | <-> | A3 |
| 6 | D9 | <-> | C12 |
| 7 | D5 | <-> | A4 |
| 8 | D10 | <-> | C13 |
| 9 | D4 | <-> | A5 |
| 10 | D11 | <-> | C14 |
| 11 | D3 | <-> | A6 |
| 12 | D12 | <-> | C15 |
| 13 | D2 | <-> | A7 |
| 14 | D13 | <-> | C16 |
| 15 | D1 | <-> | A8 |
| 16 | D14 | <-> | C17 |
| 17 | D0 | <-> | A9 |
| 18 | D15 | <-> | C18 |

As per KAI's statement you don't need a ground very close to bus wires since they toggle all simultaneously and there is not much to worry about see kai's statement above more more clarification.

| 19 | Ground | | B1 |
| 20 | KEY | | |

You have a ground close to KEY signal.

| 21 | Reserved | | |
| 22 | Ground | | B1 |
| 23 | -IOW | <- | B13 |
| 24 | Ground | | B1 |
| 25 | -IOR | <- | B14 |
| 26 | Ground | | B1 |
| 27 | -IOCHRDY | -> | A10 |

Forget Reserved not yet in use You have GND accompanying rest of the signals.

To clear your doubt regarding rest of the signal where you see ground after 3 or 4 signals read point number *1 above.

Regards,
Prahlad Purohit