The green dipped beam indicator (as below) in my instrument cluster isn't working...

However, my instrument cluster is the old fashioned one, with 2 plugs I believe? Its a 2.0HDi 110 semi-mux, without the oil temp gauge (as below):

How do I go about replacing the bulb? Are they LEDs that are soldered to the board, or removable bulbs?
I saw this video: https://www.youtube.com/watch?v=OnEslfVhxOo , which looks to be exactly the same cluster, and it look like the bulbs are removable (white cap looking things on the back)?

If they are replaceable, where do I get the bulbs from?
Many thanks!
Benjamin