Is SFP port part of first switch ?

RB2001uias :

Is SFP port connected to the gigabit switch ??

I have eth1 as master port for eth 2 to 5
eth5 is connected to an ethernet to optical transceiver, but now I can connect that fiber to SFP port:
Can I just set eth1 as master port for SFP interface ??

Thank you

http://i.mt.lv/routerboard/files/Block-RB2011UAS-2HnD.pdf

Clear, thanks.