These cables are sold to fit to OpenBCI:

https://www.aliexpress.com/item/1005003091422181.html?spm=a2g0o.cart.0.0.154838daSwT1Y4&mp=1

1. We can so solder this cable to the three electrode cable of AD8232 Ecg modules which can also be found on Aliexpress:

https://www.aliexpress.com/item/1005003303539135.html?spm=a2g0o.productlist.0.0.5ef06e72BMiZQY&algo_pvid=103487f0-f9d1-49fa-aa68-1f45df93667c&algo_exp_id=103487f0-f9d1-49fa-aa68-1f45df93667c-10&pdp_ext_f=%7B%22sku_id%22%3A%2212000025104962475%22%7D&pdp_npi=2%40dis%21USD%218.76%214.38%21%21%21%21%21%40210318be16625317639351403e5aca%2112000025104962475%21sea&curPageLogUid=NZ7TiIavJ75I

to get ECG cables with connectors which fits to OpenBCI modules.

2. The following cables can also be used with OpenBCI:

ECG cable with 10 wires:

https://www.aliexpress.com/item/32947419502.html

disposable ECG electrodes:

https://www.aliexpress.com/item/1005004275010531.html?spm=a2g0o.productlist.0.0.1cedf54c17etKN&algo_pvid=54c4733b-7f63-4280-810a-f06cd3e12d15&aem_p4p_detail=2022090700525111252018017014120000118583&algo_exp_id=54c4733b-7f63-4280-810a-f06cd3e12d15-1&pdp_ext_f=%7B%22sku_id%22%3A%2212000028594789230%22%7D&pdp_npi=2%40dis%21USD%2110.66%217.99%21%21%211.38%21%21%402103250d16625371717155076e3148%2112000028594789230%21sea&curPageLogUid=GPjYxJpra6Uo&ad_pvid=2022090700525111252018017014120000118583_2

but these ECG cables have Touch Proof Connectors:

https://besdata.en.made-in-china.com/product/MdHAPyIDhQYi/China-Medical-AgCl-EEG-Electrodes-Touch-Proof-DIN-Connector-Neurosurgery.html

which need a Header Pin (OpenBCI board) to Touch Proof Electrode Adapter (ECG cable):

Header Pin to Touch Proof Electrode Adapter

3. The OpenBCI EMG/ECG Snap Electrode Cables:

EMG/ECG Snap Electrode Cables