Hello. I have a Volvo Penta 5.0GiPEFS in a 1989 Bayliner 2556. Bought boat in 2011. Engine was installed in 2001. Tilt/trim package was charged for and put in, but no gauge. I will try to attach photos showing the trim switch and part of the harness in the back of the boat that appears unused. Does anyone know (1) does this tilt/trim allow for a gauge? and (2) how do I get instructions; or (3) how is it done? Photo of the dashboard switch won't upload but it's just a black bar with two white buttons (up and down) and says Volvo Penta. Doesn't look like some of the wires in back coming from the drive are being used. Any ideas? Thanks. Bill