technics sp 15

Look @ the bottom of the deck for a hole located below the base of the tonearm to see what type of connector (RCA times 2 or a single DIN) is needed.

Unlikely, but there could be a junction plate requiring soldering the new cable. 

DeKay

thnx ,yes that is where I saw what could be 4 or 5 pins that could connect to a plug or something similar. I will check what tone arm it has a track down a connector.

You need a DIN female plug with appropriate holes attached to the end of a two-channel cable with RCA connectors at the other end, along with a separate wire with a spade connector for grounding to a phonostage/preamp.

Jason ,you hit it right on! Thnx ,now the hunt to find the the plug with the rca connectors. Hopefully ,it works like its reputed ability and i will be one happy dude!

I hope I'm not the only person confused by this post.  I'm not familiar with this turntable -- is the OP saying the only cord attached to the base of the plinth is the power cord?  No Ground Wire or Two RCA Jacks coming out of the turntable guts?  I don't think I've ever seen a turntable built during the SP-15 era (1979 to 1988) that didn't have RCA jacks, a Ground Wire, and a Power Cord attached.  Learn something new every day.