How to install led lights in gauges

What do you mean.. Most just plug in to the existing fixtures.

Here's a video on how to upgrade the gauges, not just the bulbs, if that's what you're looking for...

https://youtu.be/r3xJxEiIlIQ

I have done this upgrade to quite a few cars and it works really well. If you have other small gauges make sure you get a warm strip to hopefully get close in color.
Click to view attachment

2 ways to do it.
Use the LED strips like in the video, or use the plug and play bulbs. The bulbs are cheap and easy, the LED strips are a more complicated install, but look a little better. For me the bulbs are more than sufficient compared to stock at least 2x as bright and a clean light makes the gauges look white again.

@mb911

When I first saw this thread it reminded me of spam. I expected to see a link in the post. OP's first post and hasn't followed up yet.

Good point.

Here is a video for the 911, but it's basically the same for the 914.

https://youtu.be/osndj1ZawXg

Cheers
Engelbert