You need to go inside it and press your use key on it, but I haven't been able to find a way to spawn in it either.
Valenz, I clould not find a way to spawn in those tubes. Entering and pressing "E" gives only some system message something like "You are matrixed here...". No any other functions of those tubes was found. Looks like in current moment only visual design was presented on test server and functionality is in develop yet.