Wire conundrum

[g1ul10]

I'm about to play the sixth and last scenario of the VASSAl Academy. In that scenario, the Soviets are given three wire markers. I have no idea how to play them.

Wires are not mentioned in the 4th edition rulebook. They appear in the TEC, where we learn that they can be placed anywhere but water and can be removed by Engineers. I found no mention, though, about how the good Engineers are supposed to do that.

The use of wire markers has been already discussed in this forum (c.f.  this thread  ) and my understanding is that that discussion led to this note. But the note is in contradiction with the TEC, so I'm wondering if it should be considered outdated.

All this leaves me without any clear answer. I'd appreciate any help.