9) Slide port piece B in to port rebate
B1/B2. Align with the 'T' shaped cut.
10) Place glue in port rebate B3
and V-groove 3 and 4.
11) Hold the cabinet closed and align
the join.
12) Hold the cabinet so it doesn't
change shape.
Press port piece B in to port rebate B3,
so that it makes a seal with the bottom
of the cabinet.