Athena Pride stabilized wood

[TJDJ]

Can anyone help with a wiring diagram for the Athena Pride my mate has a problem with his and wants me to fix for him ive done a few DNA's but not the Athena and looking at it

on the negative wire there is a plate that has a shrink tube on it then the wire at the other end and goes to the board anyone know what the plate with the shrink tube is iv'e not come across 

this before on a DNA

 

[TJDJ]

sorry it was on the positive wire not the negative