Looking good!
One of the first things to do should be to move the compressor housing around to where the outlet hose wants to be. As shown, it's aimed at the radiator. Probably wants to be aimed downwards --- mine was aimed down and slightly towards the engine block. Just a simple matter of loosening the housing mounting hardware a little bit and rotating it. Before tightening this hardware, install the WG actuator mounting bracket, then the actuator. Ensure the actuator doesn't have any funny angles. This is all easiest to do before installing it on the engine --- hardware access.
Once the compressor housing is oriented the way you want it, order a couple elbows and any size adapters you might need, compressor outlet size might be different than FMIC inlet. Also think about the turbo DV / BOV and how you want it configured. After lotsa trial-and-error, I decided on DV but taken off near the throttle body, not between turbo and FMIC. But others have done the BOV option with no apparent problems. Trial-and-error involves different hoses and fittings --- time consuming and costly, but maybe necessary, depending on how your build responds. Adapting the 3" compressor inlet to your air filter (2 ¾"? --- I have an MAF) can be done now too --- wrong length can be easily shortened, but harder to stretch so don't skimp on hose length. And allow for a OCC "T" adapter too (starting to get messy?).
A couple examples of "T" adapters, metal version was fab'd by a local shop out of off-the-shelf couplings.
I used banjo fittings for coolant --- no space available to install elbows. Actual oil / coolant hose length is best decided after installation --- hose length's are affected by routing around manifold tubes and large compressor housing. Hopefully Garrett sent installation instructions. If not, make sure the oil drain line is on the bottom and install this hose / fitting before installing the turbo. It's one of the most difficult hoses to replace once installed. And make sure it's well insulated from the manifold tubes or it will burn / melt --- another benefit from ceramic coating is minimizing this hose problem.
When choosing turbo / manifold mounting hardware, think about removal / installation for repairs (i.e. gasket) --- getting tools and fingers into tight spaces.
So much to do --- I hope others following this thread and thinking about this upgrade are taking notes. This is NOT an easy "plug-n-play" install. Besides big money for parts, there's other choices to be made, each affected by the specific build and goals.
Have fun ---