Use 3 14mm bolts to secure turbo. One closest to the downpipe (shown below) should be put on right after you put the gasket on or it will block the gasket.
Put a gasket on.
By gently bending the oil hard line, align it and use 14mm bolt to connect to turbo (circled in RED). Be sure to use a washer while putting it back on.
Reconnect the coolant return hose as shown here. Circled in red.