This latest version of Syncro bulkhead has an ergonomic design and if one is not using the underwater strobes, the hot shoe cable can be removed allowing for more space inside the product.
(https://seafrogs.com.hk/collections/spare-parts/products/spare-sync-port-bulkhead-ver-ii)
(https://seafrogs.com.hk/collections/spare-parts/products/spare-sync-port-bulkhead-ver-ii)