Early this year Bacchus posted exactly what it seems you are looking for in the Library section. Go to
Trawler Forum - Library - Mainship 34T Bill of Mat'l & Part Info
Wiring diagrams will be rudimentary as Mainship refused to publish detailed ones.
Also engine anodes will be engine specific. For the single Yanmar 6LY there are: three on the main heat exchanger- on the port side, one, sometimes none on the transmission oil cooler- above the transmission and one on the air cooler- to the starboard aft and one on lube oil cooler- underneath the air cooler.
David