I just received a Zimmerman 55 gal 3-pt boomless sprayer. Haven't had a chance to use it yet. I'd like to do some spraying later this week if the rain lets up. PTO pump has chains on it to keep it from spinning. Instructions say hook them to something, but no specifics. What do you typically attach them to?? Unfortunately, tractor is at camp and I'm not, so I can't "figure it out" till I get there and I'll be pressed for time since my son has 5 pm baseball games every nite this week to make up for rainouts earlier in season.