molex-ont: fix dead EasyEDA link and add prebuilt (no-soldering) option

The "Example of the final board" EasyEDA/OSHWLab link is offline; repoint it to
the Web Archive snapshot so the reference still works. Also add a short
"Prebuilt board (no soldering)" note for readers who would rather not solder an
SMD Molex connector, with a hot-linked photo (no binary added to the repo).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: tomav

_tools/molex-ont.md

@@ -8,6 +8,7 @@ layout: default
 In some sticks, such as those based on Lantiq chipsets, the serial interface is exposed in the upper pins of the ONT, in order to read them there are two possibilities:
 - the use of an SFP molex ([farnell](https://it.farnell.com/en-IT/molex/74441-0001/connector-sfp-rcpt-20pos-smt/dp/2112385)) to which four wires are to be soldered and the other pins removed. This makes the adapter compatible with a single serial combination.
 - the use of a board to which the SFP molex is soldered, exposing the main SFP pins.
+- a ready-made breakout board that already exposes all 20 SFP pins on 2.54 mm headers, if you'd rather not solder an SMD Molex connector yourself (see below).
 
 {% include image.html file="ma5671a-root-1.jpg"  alt="Example of how the SFP-TTL adapter is to be connected" caption="Example of how the SFP-TTL adapter is to be connected" %}
 
@@ -22,4 +23,12 @@ the components to be soldered are instead:
 - 1x MOLEX SFP (like Molex-744410001 [lcsc](https://www.lcsc.com/product-detail/Card-Edge-Connectors_MOLEX-744410001_C277615.html), [farnell](https://it.farnell.com/en-IT/molex/74441-0001/connector-sfp-rcpt-20pos-smt/dp/2112385))
 - 2x pinout 2x10 (like [MINTRON MTP125-1210S1](https://www.lcsc.com/product-detail/Pin-Header-Female-Header_MINTRON-MTP125-1210S1_C358699.html))
 
-[Example of the final board](https://oshwlab.com/user4091049/sfp-to-ttl-v1) with these components on the EasyEDA platform.
+[Example of the final board](https://web.archive.org/web/20240925035336/https://oshwlab.com/user4091049/sfp-to-ttl-v1) with these components on the EasyEDA platform (the original project is offline; this links to the Web Archive copy).
+
+## Prebuilt board (no soldering)
+
+If you'd rather not solder an SMD Molex connector, a prebuilt and tested board is also available. It exposes all 20 SFP pins on 2.54 mm headers with RX/TX silkscreen, so you slot the module in and connect your USB-TTL adapter — no soldering required.
+
+![Prebuilt SFP-to-TTL adapter (v1.2), all 20 pins broken out to 2.54 mm headers](https://tvi.al/content/images/size/w960/2025/12/sfp-to-ttl-v1.2.png)
+
+[SFP-to-TTL Adapter](https://tvi.al/sfp-to-ttl-adapter/) — ships worldwide.