you can call your tower 688_tower_1 f.i. and once you have remapped the ids of the tower, you open the 688.upc file and change the link from
[UserPlayerUnit 1.UnitPartSlot 1]
ID=BalaoConningSlot
NameDisplayable=Conning Tower Mount
Type=NULL
AcceptedTypes=GatoConningTower ;Only UnitParts of this type could be placed here
IDLinkUnitPartIntervalDefault1= NULL, 1944-04-01, BalaoConningMs9
IDLinkUnitPartIntervalDefault2= 1944-04-02, NULL, BalaoConningMs32
ExternalNodeName3D= Z01
to
[UserPlayerUnit 1.UnitPartSlot 1]
ID=BalaoConningSlot
NameDisplayable=Conning Tower Mount
Type=NULL
AcceptedTypes=GatoConningTower ;Only UnitParts of this type could be placed here
IDLinkUnitPartIntervalDefault1= NULL, 1944-04-01,
688_tower_1
IDLinkUnitPartIntervalDefault2= 1944-04-02, NULL,
688_tower_1
ExternalNodeName3D= Z01
but didn't you clone the sub and the tower using Mikhayl's excellent tutorial in the first place ?
well here it is :
http://www.subsim.com/radioroom/showthread.php?t=134575
keltos