The 622 sync cables are two prongs of different sizes with a post in between and the TT5 doesn't have a PC socket only a mono plug.
I've used HH type plugs OK with my Sunpak 622's and even Wien receivers. For compatability I've cut the centre pin off some sync cables to be able to use them with Quantums and Lumedynes.. works OK.
Theres only one sun. Why do I need more than one light to get a natural result?