Why are you going with some no-name aftermarket BOV? There is no performance increase, and with a unit like that there's no guarentee on any "cool sound" either. and actually on most near stock Supras it will cause them to stall unless plumbed back into the intake piping (post-MAF).
Besides those facts, I'm looking at those photos (and they suck) and I'm not seeing all the needed stuff.
I.E. For a BOV you need 3 things.
1) Pressurized side of the BOV
2) Outlet
3) Signal Line
I'm not seeing all those things, unless those shiny holes are the outlets..