I Might have this Wrong, But.
My L35/TH400 1968 Car I have had since 1983 never had [oil pan clip for the transmission lines]: TH400 cooler line holders that attach to the Eng assy.
I have had "S" in line tube spring clips iaw
AIM
Page 357
UPC M40
A11
Piece # 2
Photos to Follow
Jim