Hi all!
Just wanted to say thank you for all the helpful instructions and images here, without these I would've never attempted to fit the cheap aftermarket remote control to my Jazz. However, I still ran into some troubles, I'm not sure if I have a special version, but for me only the driver's side door would activate the central locking, so when that lock broke (got stuck) it was a real pain to get into the car (climb in through passenger side, reach over to unlock all other doors by pulling the pin on driver's side).
Anyway, I just wanted to add some pictures for people who have the same type arrangement and where the wires and colors likely also don't match the ones posted here earlier.
As you can see in the attached pictures below, there was only one 5-pin connector with relevant wires near the fusebox coming from the driver's side door. I found that the two leftmost ones activate the driver's side mechanism (likely a solenoid?), with reversing the polarity between them deciding if the door locks or unlocks. I tried tapping into that, but after a detailed look into the wiring diagram (I am still not sure which one applies in this situation, and the colors anyway did not match for me) I found that I would have to cut the wires so the remote can take over control (they'd be connected to ground while inactive, so injecting 12 V into either by themselves would lead to a short circuit). So you'd have to follow the relevant diagram from the manual that comes with your remote.
So in my case I had the orange and orange/black wires connected to ground, yellow and yellow/black connected to +12V (via a separate fuse tap) and the white and white black connected to the yellow and white/black wire from the 5 pin connector to the door.
If you want the indicators to blink for open/close you can use the green and green/yellow wires on the connector above, as you can see from the pictures I used wire tap connectors to tap the brown wires from the remote control unit to the indicator lights.
After spending way too much time in the foot rest area I am happy to report that this is all working really well for me, and I would like to thank all the people here for providing all this information. I hope this helps others who have similar lock problems and happen to have one of the Hondas like mine where the central locking seems to be wired a little differently.
https://imgur.com/a/ptxOZ7YCheers, Roland!