Battery Disconnect Switch Question

[hala514]

Hello,

I was planning on putting in a battery disconnect switch with my roadster for its safety benefit. Specifically, this one:

http://www.summitracing.com/parts/FLA-FR1002/

Then I started thinking it would be a nice additional security feature as well if I got a keyed one, BUT, if I used it that way I would be turning off keep-alive as well.
Has anyone out there cut into the harness to do this? Circuit diagram shows it might be easy - bring a separate 12V into pin62 on the 70 way PCM connector.

Thoughts? Wanted to get some feedback before I do something potentially stupid.

Second more minor questions is: what are the purple and pink wires that are "hank-taped" to the gas pedal loom? (proper usage of hank-taped?)

Thanks,
Ted