PreAmp Audiotek AT-8700DSP

Installing a Pre-amp on the MK2 GTI Link For the Pre amp: https://www.amazon.com/Audiotek-Equalizer-Gold-Plated-connectors-Motorcycle/dp/B09BRY3TSB/ref=sr_1_1?crid=3T7WB4B24IZIZ&keywords=audiotek+7800dsp&qid=1694666594&sprefix=audiotek+7800dsp%2Caps%2C146&sr=8-1