> For the complete documentation index, see [llms.txt](https://hrftank.gitbook.io/hrftank/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hrftank.gitbook.io/hrftank/iii-build-manual-electronics/11.-lighting/11.3-lights-assembly.md).
# 11.3 Lights assembly
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{% step %}
### Install the multi-core cable connectors
If you haven’t done this yet, install the two 2 pin connectors on the multi-core cable connecting the front compartment with the middle compartment. I recommend using JST-RCY male connectors on multi-core cable (female on LED leads).
{% endstep %}
{% step %}
### Assemble the front LEDs
Solder wires with the appropriate connectors to the front LEDs. Make sure the polarity is correct!\
Then, glue the LEDs to the 20x30 mm heat sinks using thermal adhesive. Mount the lenses on the LEDs and route the wires through the slots in the heat sinks.
{% hint style="warning" %}
Try to finish everything before the glue dries — this way you don’t need to worry about whether the LED is perfectly centered on the heat sink.
{% endhint %}
Next, place the LEDs with the heat sinks in the front cover. This may require some force.\
If the heatsinks do not appear to be held securely in place, you can additionally secure them with M3x30 or M3x35 screws (x2).
Reinstall the front cover and connect all the wires.
{% endstep %}
{% step %}
### Prepare the multi-core cables for the rear LEDs
Put cable glands on the 4x0.14 wires and install the connectors - use 1- or 2-pin DuPont 2.54 connectors on the rear ends, and connectors compatible with your power system on the front compartment ends.
Mount the cables with the glands in the rear compartment and route the connectors through the side openings.
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{% step %}
### Install the rear LEDs
Prepare the red THT LEDs (2 pcs), white THT LEDs (2 pcs), and the rear LED holders.
{% hint style="info" %}
In the LED holders, the polarity markers are located on the outside, with the “minus” facing upwards.
{% endhint %}
Place the LEDs in the holders — red on the outside, white on the inside.\
The shorter LED leg (negative) should face upwards.\
Trim the LED legs so that they extend about 3–4 mm from the holder.
Mount the holder with the LEDs on the rear part of the fender (watch your fingers!) and secure it with M3x8 self-tapping screws (4 pcs). Tightening the inner screw may be difficult — if you can’t manage, that’s fine.
Finally, connect the wires to the LEDs.
{% endstep %}
{% step %}
### Connect the lighting wires to the control system
Connect the front and rear LED wires to their power and control system located in the middle compartment, such as the Main PCB.
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