Here's what Cioks say about the 5030 Flex 5 Jack Plug:
Type 5 Flex cables are black and fitted with a tip positive 3,5mm jack plug also called mini jack. This Flex cable standard is quite common mainly in older pedals like those from Electro-Harmonix or DOD also used in older Wah or RAT pedals, the KLON Centaur and many others. We offer this Flex cable type with angled (L-shaped) plug with cable lengths 15, 30 or 50cm. For pedals with recessed power sockets or other special needs we also offer this Flex cable type with a straight (I-shaped) plug in 50cm length.