When I put in two straight piece of ductwork it puts a connector between them. What does that? I am not using design line. Yes I want them there but need to know how they get there. I thought it was thru button mappings but I do not see the button code for the connector in the list.

coup is the button code assigned to the coupling.

here is my button mapping:

+ Bend = EL1
+ Bend = EL2
+ RedInline = TRANS
+ OffsetReducer = RedInline
+ RedILTee = STRT, TAP, TRANS
+ RedILTee = STRT, TAP
+ RedILTee = T
+ Red4Way = X
+ Red4Way = STRT, TAP, TAP
+ RedBend = EL1, TRANS
+ RedBend = EL2, TRANS
+ ShapeChange = TRANS
+ -------------------------------------------- = EXTENDED MAPPINGS -----------------------------------------
+ TAPD = STRT, TAPD, RedInline
+ PSU = STRT, PSU, RedInline
+ RGS = STRT, RGS