You don't "carry" a bomb squig, they're about as tall as a gretchin. The bomb squigs just follow the ork around until they're prodded in the direction of the enemy. Nor are they like C4, because you place or drop C4, whereas bomb squigs chase the enemy then explode. They're a slow moving, enemy targeting explosive.
Their place that I imagine they'd take from a design perspective would be similar to C4 or a 1 shot rocket. Not that it would be directly parallel to w/e a piece of c4 does, or a rocket does... they're similar high impact low count explosives. Similar I know you don't 'carry' a squig. "Carry support and move (someone or something) from one place to another." even if technically I'm still correct in using the world. Why are you hanging up on specifics that are clearly already fleshed out enough for you to get my points? The context of what I've said already solves your problem.
Here is how the bomb squig should work you lock on to a target with it and just let it loose. The lore for the lock on is you throw meat at the target. There should also be attack squiggs which are similar to the bomb squig except it is used against infantry and it jumps onto them and starts to bite them. If it downs them it does a execution and it does a face eater squig moment where it eats their face. The last type of squig is the eating squig where it gives a slight health boost and some extra regen. Down side to bringing squiggs there is a chance where it might attack you Risk vs reward down side to the eating squig is you might have brought a face eater squig instead.
Bomb squigs for Tankbustas/lootas to help better fill in the Anti-armor part, attack squigs for Meganobz in case a lucky git comes up from behind and tries to kill the nob when he's not looking, jump pack squigs for stormboyz (basically attack squigs but with jumps attached) to help in battle and Cyborg squigs (attack squigs with cyborg inhancements) for mek boyz to help keep the other non-cyborg gits in line. Enough said. Of course i have no problem using grots instead, but they're probably more useful in helping to operate machines and defend bases from other enemy advancements as NPC's though.
We seriously need a minigame for orks that's basically a face-eating race between the face eater squig and ork. Expect a lot of button smashing
No suicide bugs please!!! Otherwise we get imperial guards bombs stripped to their chests because we all know how unless the imperial guards are
