FZ150 and USB cable...
It is a micro USB.
I have two other cables marked as Micro USB all of which fit the FZ150 port.
BUT -- none of them work with the camera. The internal wiring is probably different, which, if this is the case, will make it difficult to find a a suitable cable without going to Panasonic (or spares dealer) for it.
Not sure why you can't use an extension - but you know your setup.