Pins D72 / D73 hardware access?

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it looks d72 / d73 pins ( connected tx/ rx led next native usb port) accessible software or did missed something?
i suppose these can used in addition ( indicator led )  "standard" led on pin 13 have pin connected it. nice.
i hoping tx/rx can associated additional serial ports, have not @ software , not yet. perhaps knows sure.

cheers vaclav

addendum:
with exception of "tx" led color - green - , not yellow shown on schematic works expected.
during casual test, noticed "l"  - pin 13 led stays on without deliberate software set on, apparently default. noted not connected ( in schematic) "standard" serial on uno tx  ( think, lazy verify that).
the schematic labels these connections /led pcb traces txl , rxl note "connect" so  question should modified - or "connect"?
 

quote
during casual test, noticed "l"  - pin 13 led stays on without deliberate software set on, apparently default.
this led has buffer driving it. pin 13 floating high illuminated. connecting scope probe or pull-down resistor make turn off (with empty sketch).

quote
it looks d72 / d73 pins ( connected tx/ rx led next native usb port) accessible software or did missed something?
yes.

quote
i hoping tx/rx can associated additional serial ports, have not @ software , not yet. perhaps knows sure.
you can use these led's signify connection "connect" want in code.


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