Trenches Illumination

Can the two trenches that illuminate be on the same side of the reservoir or is it one that lights up on each side?

Please review rule 5.5.3 and Figure 30 for more information regarding the illuminated Trench possibilities. The Trenches which become illuminated will always both be in the Community which is Dormant during Phase 1 (i.e. the one that is being used by the Support Crew).