The 5 pin connector of the DCP405 front panel is not flat with the front side of the panel (is is recessed). This works fine for the supplied push-in connector, but the general screw type of connectors or angled connectors don't fit.
If the connector is moved forward a few mm (just like the MIO168) to make the front become flat with the panel and not with the PCB, other types of connectors will also fit.
I physically tested this with the crowd supply version (R2B11).