2004 21 LSV Depth Finder Question

[afcase]

Purchased 2004 21 LSV last year with a  non working depth finder.  Got the PD-WBL as recommended on this forum and am planning to spice it into the existing cable to connect to the module.

This will only give me Depth not water temp but I am okay with that. 

A few  questions.

I actually found an original  module and transducer for $200.  How difficult is it to get the old transducer changed out for a new one?  Would this require drilling out the old one?  Is this a DYI or big job I need to bring to a Malibu dealer?  ( Malibu dealer 2hrs away)

Second, if replace either where do I run the cable?  I have been unable to open the center gas tank cover in the middle of the floor.  The previous owner actually placed a flush handle there. When I removed the side  screws and tried to lift it open the handle stared to pull out, so I stopped.

The existing cable goes under the driver side rear locker then I have no idea where.  Can I run the cable through the rear locker to along the side to the dash>?

Thoughts comments and experience?

 

Thanks

Frank 

 

Edited July 25, 2018 by afcase
add pics

[afcase]