You missed the K1000 port (not the speaker output)...that's the 4 pin XLR port that outputs it in the link I gave you. The WA5LE doesn't have this, but the WA5 DOES! Please see the attached link and this is well known of the WA5 amp.
No, that is incorrect, again, look at the actual product page of the WA5.
Note the "Headphone amplifier specifications"