Small LED and Switch Wiring

[LRD414]

I want to add a few small LEDs to the rear interior that are controlled with a simple on/off switch and connected to permanent power from aux battery.

I have a Traxide kit, so already have a convenient & suitable power feed.
The existing power cable is a 5mm auto twin, fused and grounded to an earth stud (see diagram).
The planned LEDs are 3W each so up to 12W total if I use 4 of them (may use only two).
My proposed circuit is circled in green in the diagram below.
Couple of questions ?.

Ground for Switch - can I just use the Traxide power cable negative wire or do I have to separately ground to an earth stud?

Ground for each LED - can I daisy-chain the earth wires between LEDs and then to the switch ground?

Power for each LED - can I daisy-chain the power supply between LEDs?

The switch is a 20mm diameter eBay special with spade style terminals (see diagram).
Would this typically be suitable for the application I have? i.e. to supply 1A (switch capacity not confirmed in listing).

Cheers,
Scott

https://www.aulro.com/afvb/images/imported/2016/04/573.jpg

[bsperka]

Ground for Switch - can I just use the Traxide power cable negative wire or do I have to separately ground to an earth stud? If Traxide negative is to chassis / body, then to the body is ok. If not, back to battery.

Ground for each LED - can I daisy-chain the earth wires between LEDs and then to the switch ground? Yes, but if there is a break in the chain, lights after this won't work. Rare problem.

Power for each LED - can I daisy-chain the power supply between LEDs? Yes. Same issue as for ground.

The switch is a 20mm diameter eBay special with spade style terminals (see diagram).
Would this typically be suitable for the application I have? i.e. to supply 1A. Should be fine.

[LRD414]

If Traxide negative is to chassis / body, then to the body is ok. If not, back to battery.
Thanks. Yes it is to body (shown near top of diagram).
So was assuming I would not need a separate ground/earth cable for the LEDs or switch but just simply connect to the Traxide negative as per my diagram?

Scott

[LandyAndy]

Scott.
There is some pretty fash marine gear available to suit your high standard of modifications.
To start with look into a marine busbar to distrubute the power,once its in you can add more with ease.
Andrew