anyone here replace their clutch lines?

i have a long braided ss line to replace the solid line
(from the clutch master cylinder to the firewall bracket)

also have a short braided ss line to replace the rubber line
(from the firewall to the bracket on the trans)

was wondering if there is a replacement for the remaining short solid line on the trans (from bracket to slave cylinder)

or is this not necessary at all?

also, should i put something on the threads for a better seal, like teflon tape?