Test the placement of the gusset to make sure it overlaps the joint of the truss. Also make sure it extends to the edges of the wood on all sides without going past the edges. Pre-drill nailing holes in wood gussets to mark nail spots that go into the frame, making sure you do not hit nails from the other side.
Drive spikes on metal gussets into the wood with a hammer to hold them, then add nails in all holes in the metal plate.
Set wood gussets with glue or construction adhesive, then drive nails that extend through the gusset into the wood framing. Use hardened spiral-shank concrete nails for both metal and wood. Place gussets on both sides of each wood connection. Some specifications say to use nails that extend through wood gussets into the wood gusset on the other side, but not beyond its surface.
Install wooden peak gussets with a horizontal bottom and sides angled to the slope of the rafters. Use rectangular plates to connect bottom chords and braces, making sure they cover the joint with enough overlap on each frame member to fasten it securely. Get metal gussets sized to the slope and shape of the truss. You can buy these at building supply or roofing material stores. Ask the supplier for advice on size and strength for the truss being built.