You need a simple mono audio input on a panel and don't want the extra bulk of an enclosed housing. This 3.5mm open socket from Jaycar is all you need. Strip, solder, mount to your panel. One clean mono connection, no fiddly bits. $5 flat, in stock down under
| brand | JAYCAR |
| connector_size | 3.5mm |
| channel | Mono |
| mount_type | Panel mount (open) |
| category | Electronics & Components > Cables & Connectors |